I'm only replying because there's no other replies at this stage, I'm a cis dude and only have limited experience with these topics, but there's some universal stuff I think I can maybe talk about here. I wouldn't want a 15 year old genuinely asking the internet for advice and receiving nothing back.

So you're going through a weird time, 15 is a difficult time regardless of your feelings on gender. Just make sure you give yourself some slack there.

It's not uncommon to have identity instability at that age. You're going between the identity that you were given as a child to the identity you want to grow up with, regardless of if that involves gender or not.

It's probably going to be a bit of a long process, but it's worth going through. There are so many people that never went beyond what their parents decided they should be, and it's not good for you.

If we're going to more practical advice, if you're feeling something internally, it's definitely more important to follow that. Understanding yourself, your own motivations and what makes you want things, it's invaluable.

Fitting in seems important, but it's really not. It's much better to be different and have a few people in your life that love you for who you are, than it is to be like everyone else and have a bunch of people that don't even know the real you.

There are going to be realities you may have to work with. If your parents are weird about it to the point of danger, you may have to prioritise survival over self expression, hide yourself around them. It sucks, but it's understandable. It's not a betrayal of who you are, it's self care. Get safe, get self sufficient.

I'd say ultimately follow what you're feeling. Experiment, be yourself. I know it'll probably be difficult, but if you just leave it alone, it's likely going to be eating at you forever.

Good luck mate! 👍