Have a guy friend I know is bi but doesn't know I'm curious...

How do I tell him I want to experiment with him without anyone feeling awkward and without hurting feelings? We used to be really close friends but now we've drifted off but were still friends. I know at least he used to be into me but idk anymore. Ive never given another guy head or done any anal with a guy or girl (I have had vaginal sex many times and received and given oral sex to a girl) Throwaway account because I want to keep this on the low.