You would do just fine! Too often we allow ourselves to think that sex has to be perfect each and every time has to end up with a mind-blowing orgasm. This just isn't the case all the time (don't we all wish it was) We all have had those experiences when the mind was willing but the body was weak (or sometimes the other way around). Just share yourself fully each and every time and no matter the outcome, the two of you will learn what works and what doesn't. Remember though - practice safe sex at all times! Unless you are ready to make that life-long commitment to what may result from your romantic interludes, you must take the step to be responsible. Geez - now I sound like you dad! Sorry - didn't mean to lecture. Just relax and enjoy it as it happens!