The reason he doesn't wanna go outside, he doesn't wanna eat, he doesn't wanna go to school are simple
he doesn't wanna go outside because he has no other kid to play outside, so you need to find another kid he's age to play outside and trust me he will go outside.
he doesn't wanna eat, the reason he doesn't wanna eat is because you're forcing him to eat when he's not hungry. Cook something he likes and feed it to him when he's hungry.
the reason he doens't want to go to school is because he's not getting a full night sleep. Ask your doctor for tips on how to help him go to sleep. Some kids take melatonin to help sleep but talk to your doctor about that. Usually kids who are ADHD need to take melatonin so they get a full night sleep.
all he does is play minecraft, again, find somebody he likes to play that is his age and trust me, he will turn it off and go outside and play with his friend that is his age.
You're welcome!