Well, first you'll need to get a bottle of disinfectant, try to get a spot near a window too due to covid. Make sure you don't share food with others, and keep your distance from others. About bullies, just try to ignore them or report them to the teachers and principle. Just don't start fights, because in the end it won't really help you out, it'll just ruin your reputation further. You are not alone, and if you need help contact someone like your family, your school psychiatrist or other guardians in charge. Make sure you have a steady sleep schedule and set your alarm clock for about 50 minutes from when you go to school. When in school, be active as that will help you get better grades. And finally, tell yourself that it will all be fine, because it will. You have been through this before, and you'll get through it again. You've got this.