I think the posts to say relax, don't read about it, and to just go at your own speed are the best. I will say tho, don't expect angels singing, or an earth shattering orgasm the first time. Sex, as with everything, gets better with practice! When done at your own speed, with love and with the right partner, it can be a wonderful part of a relationship and you may just feel closer to your hunny than you ever thought was possible.

The things that we spend time worrying over rarely end up to be as bad as we thought - try not to build things out of proportion in your mind. There simply is no point worrying about things that may never happen, and to only worry about stuff when it has actually happened.