Young couples

Hi ! Lol well I'm at work right now with my client . Bored and I was thinking about me and my boyfriends relationship.. so I love him a lot . I'm 18 he's 17 we have a 10 month daughter together .. we planning on moving in together when he turns 18 so he can get a better paying job to help with bills . He's saying he wanna get married (I'm scared because I heard young couples are more likely to get a divorce) .. we have big problems , trust issues , sometimes he puts other people before me , insecurities. Just so much we need to work on . How exactly do we work on the problems in the relationship ? Is getting married young a bad idea? Is moving in before we work on our problems a big mistake? Also when we do move in should I put him on the lease or no ?