First off, there's no requirement that you have everything figured out by a certain age. You'll get there. Finding support and people you can talk to, in person or online, will help so you're on the right track. I'm a LOT older than you and just figuring these things out in my own life. When I was growing up there weren't any options to be other than what I was assigned at birth so I'm a late bloomer I guess.

I've had dreams like that too. Something that's been very helpful for me is to slowly shift the way I present to a more masculine or androgynous appearance overall. No sudden changes just find bits and pieces at a time that make me feel good. I can't wear a binder due to health reasons but you might want to try one out. Experiment and see what makes you happy. Experiment with gender labels too. You aren't limited to the binary.

Even if you decide that you are trans, you don't have to be a particular kind of man. You don't have to present yourself like a guy who wants to be treated rough. There are many ways to be masculine, or even be a more femme man.