The world is called Voland. Basically the world started with just humans, and then other races came from other worlds. There were two main nations in the region we're in- one of them is super diverse and accepting, the other one is very much a human-centric place. We're currently in the diverse place, working for the city. Our current job is clearing a mine out of monsters. We're pretty even down the middle on roleplay versus combat. For specific limitations that's more up to the DM, but the general thing is that whatever you do should make sense and tie in to your backstory. That specifically applies to things like multiclassing. If you're going to multiclass, there should be an actual reason beyond just min-maxing. As for a specific role, obviously it would be nice to have another wizard, but with our current distribution I'd say you can really be anything.