because I don't want to embarrass myself or the girl either. What if one part would enjoy it while the other is trying her/his best to just run away? I gotta know her well, before I meet her and that is what I did ...

If you want this to work out, then you should put a great effort on that. What kind of effort or based on what would you put it that way if you have no clue .. who is this person?

Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment. (Gautama Buddha)