DanielH saidWhat are the chances that I won't enjoy it?
At the risk of incurring the wrath of Shifty84 for drawing upon my own experiences, I once faced a bit of your dilemma, only at an older age. Everything turned out great.
I had already decided I was gay, a late-bloomer, but I knew my first gay sex would be a test of sorts, even though I didn't want it to be. I faced 2 problems: first, I didn't want to admit nor appear to be an incompetent novice at my age, which might turn off the other guy.
Second, I wondered if I might freak out, or simply turn coward. I'd heard stories of that happening to older guys like me. I needn't have worried.
I took to cock like a duck takes to water. And I guess what I lacked in experience I made up for in enthusiasm, cause that other guy claimed I was really good, and we tricked several more times over a couple of weeks, until I realized he was cheating on a partner.
My first gay sex with him, BTW, remains the most mind-shattering of my entire life. And it started an intensely horny period for me that lasted nearly a year, during which I couldn't get enough gay sex. I theorized it was some kind of delayed rebound effect or something, because my teen years had been so sexually repressed.
Don't worry, I think if you choose the right guy you will definitely enjoy it. This is one time when you probably should let your dick head do more of the thinking for you, and not complicate things by over-analyzing. Choose a nice guy, make it safe, and have fun!