New to sex, need advice!

So my husband and I just got married and we both saved ourselves for marriage. We were super looking forward to having sex and talked about our interests and things but when it came time to finally do it, it's difficult! It takes him a long time to actually get inside me and stay inside me. We try different positions but only missionary seems to be working so far. We have successfully been able to have sex but it's taken us up to two hours between trying different things and having to lube back up, and I don't end up getting pleasure out of it so he has to do other things for me to finish. Any advice?