Kayla, when I've seen your avatar for the first time I just thought: No need to transition, you already are Kayla. When I realized the text below the image I couldn't help but feel sorry for you. I nearly started to cry.
That said, I'm a bit jealous. You just realized it so soon that many things are possible which aren't in later years. I congratulate you for starting right now. You might realize that you don't need to re-assign your gender when you start to see a therapist; at least that's why we all have to see one.
I still don't think that will happen. Given that you already started painting your nails, you just passed me on the fast track. I wish I had the guts to paint my nails. (Or at least I'd have the skills...)
The best advise might be to see where this road leads to by following it. If you carefully monitor your feelings you'll know if transition is your way.