Thank you for asking. Your having an apprehension about being able to do sex or not. It is very understable and normal. You must understand that sexual intercourse is a thing to learn which can be achieved only by trying and learning from errors. Initially few encounters are associated with intense anxiety and one may not even succeed to complete intercourse, which is very normal. You will gradually figure out a way and method of it. It will take few times to be able to have a rewarding intercourse. one must be confident and comfortable with the partner which is not possible in first few times, but happens gradually. Just stay relaxed and believe in yourself. Even if you fail, it is normal and you will always get a second chance to perform.