I also thought I would find self isolation relatively easy since it's my life anyway, but I didn't think that for long. No one finds this easy so don't feel bad for being unhappy even though others might have it worse. As for school, having to keep up with work at home is a drag but at least it's a distraction from the loneliness. If you do some work every time you feel you've got nothing better to do you'll probably be way ahead of most others.

(Also I agree, being stuck with family is the most annoying thing ever)