My copy arrived but I don't have time to play until this evening. Any pro tips for early on in this one?
Not too much to worry about early on except maybe skill point allocation since you get very few per level up at lower levels. You can respec back down to level 1, 15, 30, or 50 at any time but try not to respec before level 30 as characters come with some "bonus" points in several skills to help you at the start that will disappear when you respec.
You'll get a maid fairly early on and she should be a party staple. Aim to get her 奉仕の心 skill to level 3 as soon as possible and maid mastery eventually to level 10 (this is the most efficient skill point to benefit ratio apparently). Only need 1 level of 料理 until end game as long as you increase maid mastery. 掃除 is also a good end game skill worth leveling on maids but it's low priority at the beginning.
Also as parakeetman has mentioned, the avenger skill on fighter types (and most skills that involve regular attacks actually) is useless lol. 挑発 also worthless as it doesn't work 100% of the time. In the same vein, never put any points into heal mastery skills. All healing spells (except full heal) have a hard cap and once you reach this cap, heal mastery does absolutely nothing at all. Weapon mastery skills should also be low priority until end game when you have points to spare as they barely increase damage.
When the going gets tough, it's often better to use healing items as healing spells have casting times.
Don't sell enemy drops as many are used for side quests and several have useful effects when eaten that may be useful even in the end game.
You can also save at any time in dungeon, which I didn't notice for way too long lol.
This is also more of a long term consideration, but if you want to go for completionism or hit some of the hardest content in the endgame, highly recommend leveling either a magical princess or papillon in your main party. They offer the quickest way to level up a lower level character. Unfortunately, both of these are very mediocre/bad for the entire game until they're in their 90s at which point they become god tier (especially magical princess).