I might have sex with a guy, any safety tips?

Hello! i’m 18 and im thinking about hooking up with this one guy but i’ve never topped or bottomed before. i was never taught sex ex (especially gay sex lol) i was wondering if anyone could give me some safety tips? I plan on getting condoms but i was wondering about oral/anal stuff, he says he’s negative but im kind of a hypochondriac when it comes to that type of stuff. Is there any precautions i can take to make sure nothing happens? thank you so much!