PC is definitely the way to go, if you can endure some weirdness due to FPS calculations. There are some definite flaws in the game, but it's still a really good purchase.
Like NEO0MJ said, boost Adaptability! Almost all the starting classes start with a roll that is slightly worse than DkS1's medium roll, making the hitboxes of enemy attacks seem humongous (and some are), but after you raise Adaptability enough, you'll be able to sail smoothly through most attacks.
Getting gud is just about practice. You will get wrecked quite a many times, but every time that happens, you'll just do better next time. Trial and error, man, that's the way to go.
Straight Swords are one of the more powerful weapons in the game, which makes a straight-up Quality build mixing Str and Dex extremely viable. You also get access to them really fast, so you can get used to the movesets.
Katanas and Greatswords mostly use Str/Dex as well, so those benefit from a Quality build as well.