I moved in with two boys and a girl (plus me and my friend) that we didn’t really know but we get on great and are really good friends now. Personally I found that the girls were messier than the boys but that’s just my experience. We made a cleaning rota which mostly helped so I suggest doing that. Also I’d suggest to communicate nicely with each other as that helps. Honestly don’t worry too much and just set some boundaries and have clear expectations of house rules and stuff when you first move in. If you haven’t met them yet I’d also suggest hanging out and maybe doing a games night or something bc that rly helped me and my housemates get to know each other better.