Rant / tips?

Tomorrow I am moving in with my boyfriend🥰 (pregnant) It’s not our own place it’s with his grandma at her house, it was our best option versus my house because we won’t have to pay her rent so we can save up for our own place and many other reasons why it was the better option. I’m super stoked and I can’t wait. This is our first time for both of us moving in with somebody, like a significant other, so I guess I’m kind of just asking for tips about when there’s arguments what do you guys do to get space?