Hello Dota ppl.
Only moba I play is LoL, but that game likes to disconnect me constantly as of late, so I'm looking to fill the void. Some noob questions...
So far everything feels really clunky and the shop is a bit of a mess, but those are things I'll get used to I'm sure. Looking forward to joining this community
-Is there a way to scale the HUD? It's way too massive and I end up miss-clicking on it a bunch when I'm trying to kite backward and stuff.
There isn't, other than setting your resolution up to your monitor's resolution. You can make it draw the minimap on the right if you want to though (putting everything on the right on the left). This is under the options (gear in the upper left corner on the main menu)
-Noob friendly heroes that aren't boring? Tried out Phoenix and had no idea what was going on. On the other hand, Lina is way too basic. I typically play mages/assassins in LoL.
Phoenix might be a bit advanced to learn what you are doing in general in Dota, probably not the best place to start.
The thing about heroes in Dota vs LoL's champions is that generally spells cost more mana in Dota, and are more impactful. What I mean is that in Dota, very few heroes have what they call in LoL a "poke". Generally your "poke" is your attack. I'm not sure what position you played Lina in (she's viable as a mid generally, but can also be played as a support), but utilizing her skills can be very useful. Often it's about how you level up your skills, and use them in conjunction with your items rather than just throwing them to harass. You have to throw your spells with purpose. If you'd like to know more about that I can go into that, but anyway, onto the question you actually asked.
Juggernaut
Sven
Tiny
Dragon Knight
Clockwerk
Huskar
Centaur Warrunner
Bristleback
Axe
Sand King
Slardar
Tidehunter
Wraith King
Night Stalker
Spirit Breaker
Undying
Magnus
Abaddon
Mirana
Vengeful Spirit
Riki
Luna
Bounty Hunter
Ursa
Gyrocopter
Troll Warlord
Bloodseeker
Razor
Venomancer
Phantom Assassin
Viper
Clinkz
Crystal Maiden
Zeus
Shadow Shaman
Jakiro
Silencer
Ogre Magi
Keeper of the Light
Skywrath Mage
Bane
Lich
Lion
Witch Doctor
Warlock
Just going through the heroes briefly, all of these heroes cover a wide variety of roles in the game, and are fairly straightforward in spell mechanics. I would also put Lina in this list too.
-Is early game trading/poke in lane not a thing? Seems like I run out of mana after like 2 spells lmao.
Hah, I actually just covered this above before reading this one, so I will go into this here, lol.
Like I discussed above, early game "poke" is more often your attacks rather than spells. Spells in Dota generally cost more mana. There are very few low mana cost spells you would consider "pokes", and most of the ones that are are Unique Attack Modifiers (think something like Ashe's Frost Arrows). However the difference between how the UAM spells work in Dota vs LoL is that in Dota, you can right click the skill to have it automatically applied to your regular attacks, or you can press the button and click on the enemy to manually cast it. The difference is in aggroing the creep wave, manually casting will not aggro the creep wave on you, while attacking will.
Most of the UAMs in the game are on carries though, as far as supports and other roles go, you have to really use your spells wisely. You have to watch where the enemy is in position to potentially be killed, with the help of your teammates. If you can't immediately set up a kill, you might try to go past the creep wave (yet still staying in a safe position) and trading attacks with the enemy. Usually ranged heroes can win this trade vs melee heroes depending on who the heroes are. It's kind of complicated to explain beyond that, but that's the basic gist of it.
-How am I supposed to practice last hitting when these bots keep stealing my cs?
A few ways. First of all, you need to figure out if your hero should be taking the CS in the lane. Supports often will not take the CS (except maybe an occasional one) during the laning phase. They will get them from kills, pulling jungle creeps into your lane creeps (denying experience from enemy, getting you some more experience), and an occasional CS that your carry should let you have if you are really close to buying something.
As a core role (carry, mid, offlaner), it's about buying items to make your damage potent enough to secure last hits. At the start of a game, you should look at your hero's damage (the sword at the bottom next to the portrait), and see what that number is. This number is actually an average between 2 numbers that you have a chance of dealing damage between. For instance, if a hero's damage says 50, it's a chance to deal between 45 and 55 damage. You can mouse over your damage to see what these numbers are. Generally here's the rule of thumb though, since you might not know without the experience:
45 or less - Low, you really need items to help you get last hits early on
45-50 - Somewhat low, you might need some stats
50-55 - Decent, you may want to grab a stat item or two, but you are probably fine
55-60 - Good, you likely won't have too much trouble
60 or more - Excellent, you are a last hitting machine, there are only a few heroes in the game that start well above 60
What items do you buy to help you with this? Well first you need a brief explanation of stats. There are 3 stats, Strength, Agility, and Intelligence. Strength is HP and HP regen, Agility is armor and attack speed, Intelligence is Mana pool and mana regen. Your hero has one of these as their primary attribute, it will be outlined in gold on your HUD. Each point in your primary attribute gives you +1 damage. So with that information.
Iron Branch - +1 to each stat
Slippers of Agility - +3 Agility
Gauntlet of Strength - +3 Strength
Mantle of Intelligence - +3 Intelligence
Those are a few of the basics, there are more early game stat items though. There is also an item that particularly benefits melee heroes: Quelling Blade. Quelling Blade gives you increased damage on non-hero units (creeps). For melee heroes, this is a 40% damage boost, which is a pretty big deal. On ranged heroes, this generally is not worth it as you only gain 15% damage.
-Is smart/quick cast the way to go in this game? (assuming it exists)
It's up to your personal preference. If you liked that in LoL, by all means, go for it. It does exist, it's called quick cast in Dota 2, and you can find it under the key bindings in the options (gear in the upper left corner). I personally don't like it, but that's just me. If you want it, go ahead. Plenty of people here use it.