Hi Kayla, a lot of great advice here. Let me add a few things I hope will be of value:
1. Right now this very minute, commit to living the most authentic life you can, and learning to love yourself and be yourself no matter how long it takes.
Many trans kids get in the habit of not being themselves in all kinds of ways, not just in how they express their gender.
So in every way that it is safe to do so, start letting your true feelings, values, and personality show.
You can develope into a wonderful happy person even while working towards the day when you can be yourself gender-wise to the whole world.
2. Right this minute commit to stop pretending that you are ok when you are not. The trans kids who have the best outcomes ones who learn to stop hiding when they are sad, down, frustrated, afraid, angry, and depressed. Only if you are being abused should you hide your pain, and then only from your abuser. We don't want to lose you, and neither does your family.
3. Remember you've got your whole life to make a great life.
4. If you tell your family you are seriously depressed, they will help you see a professional. Just don't hide your unhappiness. And if you start therapy (please avoid so-called Christian counselors; you need a neutral professional) stick with it.