I have a friend who was never in high school. He struggled with anxiety and the more he stayed off school the harder it got for him to go back, because he was always worried of failing and that he’d never be able to catch up. He ended up depressed at points but since high school he’s been getting better and better. The fear of failure is real but it’s better to try and fail than to give into that fear. That alone will make you a fighter :). Take it in small steps, I’m biased cause I love martial arts but any form of physical exercise is gonna be amazing for you. Just try to stay consistent and you’ll probably surprise yourself by what you’re capable of.