I am so sorry for your situation. You should follow "CODY SPEAKS" on fb, it is put out by a mom who has a now 19y/o with aggressive autism. He has improved through the years. She has almost daily little video clips and explains what works and doesn't work with her son and she answers questions in the comments. I bet you could contact her. As far as ww, there are exercises you can do without leaving the house. Dancing, put on music you enjoy and dance. Cardio-drumming from you tube videos, body groove, strength training, Wii fit, exercise bike, or treadmill, etc. If your son is interested he may join you and burn off some energy from being in the house everyday. Your mom if she is able may join you too. With the dancing, during the lockdown, my friend has been having 10 minutes dance parties through out the day. Someone turns on the music, yells dance party and everyone drops what they are doing and dances. Her kids love it.