You are clearly not ready for this, so don't do it. Sometimes people share this and it brings them closer together in an amazing way, but you are not ready for it. Just wait.
The more I think about how our first sexual experiance went the more the flags do go up.
He doesn't sound like a jerk, he just sounds inexperienced. Would you like him to count your inexperience against you? Try not to hold this against him.
I have a long time interest in psychology, specializing in relationship dynamics for 30 years.
(Please note, we give the best advice we can based on the information given in a post. For better advice, please include the age of all romantic partners.)