Lyra, if I can, let me put on my "dad hat" for a minute and talk with you the same way I would talk to my own son.
You're a young person who naturally has questions and is looking for answers about the way you feel and act. The teen years are about growth and exploration. You want to expand your horizons and stretch the envelope.
But you are talking about major life decisions here, and you are still just 17 years old. Your posts here indicate a lot of uncertainty and anxiety. You have made a good decision by seeking out support and advice among the fine people here. That's a start.
If you are not already speaking with a gender therapist, do so as soon as you can. If your parents have health insurance, then you can probably qualify for counseling. When you get into college, it will, undoubtedly, have counseling available through the student health service. There is a reason that the "standards of care" exist. They are there to help you from making a mistake or doing something you might later regret.
I wish I had the resources available to me, way back when, that you have today. I wish you the best on your journey, where ever it may take you.
Jamie