Lots of things are about attitude.
Like virginity. If you and your partner are both able to laugh at yourselves, it will be a positive experience.
It won't be like in the movies.
It will be awful. Painful. Silly. She might bleed, he might bleed, you will have someone inside you.
Life is strange. People are strange. Sex is very, very strange, until you know someone (yourself?) well enough that it becomes streamlined.
Good luck.