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Start working out (do any amount of movement greater than you are doing now), eat food that's less processed whenever you can. When you find yourself going for food consider if you need it or if you're just eating out of habit. I'm not a genius but it's clear to me that you either have low muscle mass or high fat; both terrible, together they will fuck you up forever if you don't act. I'm going to assume you have high fat, which is fixable. Just eat less. When you body and man tit fat fades away slowly, you'll be producing less estrogen, and you should be able to stabilize your hormone levels. If the opposite is true and you're a skinny little fuck, you need to start eating a little more protein and lifting/doing calisthenics. Start small, work your way up slowly, YOU HAVE TIME, BUT THE CLOCK IS TICKING.
Other than fitness, detach yourself from social pressure. Not only is the LGBTQABCDEFG123QIA+ a hotbed of ACTUALLY toxic behavior, staying in it as a kid will fuck up your psyche for life. You are still impressionable, remember that. Some people it's not worth having around. This also goes hand in hand with being used to loneliness, as your hormone levels stabilize and you begin to find your true self, you will look back on your old social habits in disgust. You are not a woman. You don't need attention. Attention, positive or negative, doesn't validate you in any way at all. It's a drug, and the only way to stop using is to detach.
The last thing you should do is start finding hobbies, which should be easy for you because you're 16 and just about anything other than jacking off is a hobby. Get into nature, woodworking, hiking, become a gymcel, or start small. Get into a casual sport, or maybe play competitively ONLINE. Set reasonable goals and PUSH YOURSELF. It is the only way to generate natural testosterone, this is how every normal person who's not in hell world lives. Once you begin doing this you'll realize how easy it is.
Last thing, more of a suggestion. Don't shit on religion. Don't hate it irrationally. Find a religion you have a real, tangible, folkish connection to, and accept it into your life. If you do not find peace with the almighty you will find it somewhere else, and there is nothing as sublime. Nothing as all-knowing, nothing will bring you closer to your purpose and full potential. To anyone it is clear we are meant to be in contact with the uncontactable, to reach the unreachable, and to learn from it. It is the origin of all human greatness, this has been proven. What is up in the air is how you will react to it. Deny it? You can't do so without acknowledging it's existence. Hide from it? To do so is animalistic. But to ignore the issue all-together, there is nothing more self-destructive, it will lead to you places where you have never felt more worthless.
Sorry for the preaching. I hope you figure this all out, and I hope I helped you.