Having sex with a man

Hiii so I’m 21 f in this really good situation with a guy 21 m and so far it’s going really good. Recently I stayed over at his place and I told him that for me to have sec I have to know I can trust him because I don’t want to have sex with anyone as my first time with a man. I’m mainly here because I want to know what it’s like to sleep with a man. I’ve had my fair share of experiences with girls and I enjoyed them but what the hell do I even do in a situation like that with a man. I feel like I’ll get it as we go but dawg I’m not even sure what I’m going into I’ve never seen a real life human man penis before only photos and videos😵‍💫 help meeeee I don’t know what to doooo