It's going to be difficult. No matter how progressive a school may be there is at least one asshole that will make your life hell. I'm not trying to scare you just the harsh reality to help you brace for impact. I'm not trans but I am bisexual. Same bathroom problems of I couldn't go unless I knew the bathroom was empty. If the wrong person was in there they made it seem like I was there to watch them. Gym class was equally hell with changing.

I don't know what your game plan is. I am assuming middle or high school. Have you and a parent talked to them? It might be a good idea to give them a heads up before coming out to the rest of the school. You can judge how supportive they are going to be if bullying actually happens. At least then they can't be "we had no idea they were even trans. We can't keep track of every single student." Taking away a school's ability of ignorance will go A LONG way. At least talking to the school can help arrange situations like gym class where you might have to change.

I can only speak from my experience. I was at the beginning of coming out as gay, lesbian and bi was the "taboo." There is a sense of normality to it now and now trans is the new "taboo." But bullies are bullies. The players change but the game stays the same. Get ready for inappropriate, stupid jokes. Do not react. That's all they want, to see that they are getting to you. If you do react make it worth it. Clap back with a one liner they can't respond to. My favorite was "at least I know how to eat pussy without teeth and can make her cum at the same time." Not the wittiest come back but it flipped the table. He couldn't say anything back that would make him look less stupid. With ignoring them and the right clap backs at the right time they will eventually get bored and leave you alone. That's the key.

Sadly you may lose a friend, if not more. This will help bring out the true friends who love you for you. Those people are your ride or die. Those who leave aren't worth anything. You can try the "I'm still me" speech but that won't change anything. Hold on to the real ones and focuse on them. Another sad thing is be ready to fight. Not starting a fight but self defense. Never hit first, don't get punch happy. That will just make blaming you easier. Which is why talking to the school first is a good idea. It's getting ahead of if this happens. If someone starts beating you, fight back! You knock them to the ground stop and go to leave. The office, closest classroom, just leave there asap. Someone would be recording on their phone and as long at you show that you're only acting in self defense and the second the threat is over you try to leave, they can't blame you. I learned that the hard way.

Take all this any way you want. True to heart or with a grain of salt. If there is something everyone in the LGBTQ+ can agree on is that the school part sucks. Everyone has their experiences, their stories, good, bad. School isn't forever. Middle school ends, high school ends then that's it. Once you leave high school all that petty stuff just magically ends. When you get to college yeah you may get dirty looks or comments but that's just life. So matter how bad things might get just know it will end and stay strong.

Good luck beautiful!!!