Started game, got to Oleg outpost, time to start new character.
Actually, you have completed the best part of Kingmaker (theorycrafting and character creation). The rest goes downhill fast.
I don't know what character to play.
Here's a short guide to kingmaker character creation:
Actual classes/kits that you've come to know and love from D&D suck. Wizards barely do any damage with spells until very late game because of inflated hitpoints/stats. Fighters get outtanked by shit like sword saints and rogues and outdamaged by just about anything except the aforementioned wizards. Rogues aren't cool at all because they get backstab bonuses on any attack where you attack with a buddy.
So forget all that crap, and embrace your inner munchkin. Combine 14 classes together, and start doing archery spells with backstab bonus!