You should do more more exercise when you have free time, as for now, have a rest; stop learning right now and sleep twelve hours a day. Also, if you feel lonely, you could always go to your friends' homes and chat with them. Of course, a balanced diet would be helpful; remember to eat more vegetables and fruits during your free times.
The most important thing is that you should talk with your parents about participating in extracurricular activities, do you really need to join those clubs?
So try to talk with your family, I think your situation will get better soon.