Bros idiot here that got gifted this acc, after advice from last time I've been focusing on my fire team and doing rinascita story to unlock aero mc, but I have a question

If you were me, a new player with this account, apart from brant, who would you roll for? My brother said roll brant but I'm not doing that

I've got some questions
I started playing this week, told my brother the spear girl he was playing looked cool and he gave me this acc, I rolled Lupa so far, but I've been messing around with my characters and I have no idea what I'm doing

Any advice? What should I focus on apart from Lupa? I do know Changli is relevant for her, but do I just ignore the rest for now? Also, what's a good team for Lumi? she's sex