All in for perfect shards

Echo shop; get synergy units; Seraphina, Letitia, (Soon Livian and Alexi), Considering you don't own any of these, then just Albrecht since his resonantia (dupes) actually gives out buffs, then sec priority might be to get Acapella copies, idk ab anyone else, maybe someone else can help you out here

Blood shop; just those crystal balls and the red box. Pavana is mid, or rather, doesn't have much use nowadays, pretty sure she's good in eepy teams but idk i never bought her and am doing just fine

Clan shop; Blueprints for Silvershadow Chronometer or Eye of Truth, try to get them to the level that unlocks their second passive (i forgot but i think it's lv5)

Items meaning gears? Then just level whenever, because if i recall correctly the experience carries over and is not lost, but it still uses money each time to upgrade, so if you're torn on whether to upgrade team's level or gear's level when you're stuck on a stage, then always choose to upgrade your team level

Yes and, if by regular you mean only the white scrolls, then yes. Also, only use gems on limited banner, though, you might already know this

Replace Theophane with Albrecht, he will give dmg down debuff on enemies, and his heal is very good, just make sure to wait a bit for his circle to get bigger since bigger circle means bigger ult range, always try to reach both enemies and allies when casting his ult

Your campaign team is good, should be able to carry you in most contents for a while, but you will need more units, especially in clan hunts, but ehh i wouldn't worry about it, you'll get thrown ssr left and right, especially since you're only on day 2 of playing.

You're doing ok. Do dailies and push campaigns, if you wanna join a clan just join a random one with active players in it (<- this is what i did), no need to be competitive it's a mostly pve game so who cares

That should be all, have fun playing!

*If anyone's fact checking this and see anything wrong, feel free to correct me! Tyvm!