The guy already told you he has only had online relationships and he is 30. He has said he wants to try to see you this summer for a first time. I suggest you keep things very casual with him and put him on a back burner. There is no reason to even bring up the subject of sex. He told you the truth. He is obviously completely inexperienced. There is some issue there. If you like him, give him plenty of space and time. You have no relationship with him right now.