Hi Darksou,
Your post has had a lot of views at this time but not many replies, and just having views is not going to help any, so here goes.
My advice is to wait until you're sure. You're very young, you may not think so, but you are. Roughly 75% of your life is still in front of you. Living with your dysphoria another 6 months to a year is nothing compared living with the wrong decision for the rest of your life. Be very sure of what you are doing, there is no going back, but you can always move forward again.
Lori had good advice about discussing this with the surgeon. I'd go a step farther and recommend finding a good therapist. Find a therapist that's going to help you decide what is right for you. Be leery of one that's pushing you in the direction that they think is right for you. Or one that encourages you to ignore your doubts, you have them for a reason and need to understand them. Don't be afraid to change therapist if you find they are telling you, what you need to do.
You describe yourself as primarily non-binary, and well I am not up on non-binary as most, it's my understanding that non-binary covers a lot of ranges. A range goes from, those that want a body with no part of either gender, to those that embrace the gender parts that they were born with while still considering their inner gender as neither of the two. Who knows, perhaps you'll discover there are other times that you enjoy "that" body part too.
Sorry if I have this wrong or over if I have over generalized what non-binary is concerning you personally. I just honestly feel you can't go wrong by waiting until you know for sure, epically given your age.
I wish you all the best,
God bless you.
Paulie.