you will only have level 1 spells,
That’s shouldn’t be the case, though, no? Your spell slots will be increased with combined caster level, so while you won’t get higher level spells as individual class, surely a wizard could learn up high level spells? (Or is their learning ability tied to their wizard level, not spellcasters level?)
At least cantrips scale with character level, and frankly most of the time it is all I use anyway - Karlach does all the heavy lifting anyway.
My understanding from reading around is that wizards can learn higher level spells from scrolls in BG3. I'm not sure how many spell slots of what level I'll get with this build, but if I'm working it out correctly I think I'll have up to level 3. I'll watch that link you shared and see if it gives more clarity, cheers!
I am kind of expecting cantrips and talking to be the main way of dealing with issues for this character, given they're going to end up with tons of both skills and cantrips, and as you say cantrips scale with character level.
And thanks, Ussnorway, but even though this is a silly playthrough, I am still determined to RP it as far as possible, so the evil route is out, as is any significant tadpole usage though I could justify one or two (eg the one that gives a boost to first checks) just out of my character's curiosity about new experiences.