I said the exact same thing about ONE tattoo. Well....twenty one tattoos later I'm heading for another one soon and thinking about a full back piece.

There's never just "one-cycle only".

As the vets have already said, wait until the time is right and you are older. Guys that cycle when they are younger (under 25), invariably find out the hard way that waiting until they were older would have been the wiser choice. Absence of immediate side effects or problems doesn't mean they won't appear later when you are older and struggling to fix something you screwed up with yourself.