Hey guys . . . I need some advice.

So like, 3 weeks ago I got grounded because I didn't do my chores (I don't like doing them AT ALL). And my dad made it seem like I was taken off my pc for the rest of my life (I'm not even kidding, he will do it).
And so it's been 3 weeks now, still don't have my computer back, and it's coming up on Christmas in 14 days. I'm hoping I can get it back on Christmas but I doubt it. I'm having to use a school computer to be on Brainly for help with my homework.
I just asked if I could get on my computer for a little bit and he said no in the rudest way possible. So I need suggestions on how to get my computer as fast as possible. I have really good friends on my games that help me deal with this sort of stuff but I can't even talk to them about this because I'm grounded.
So my only option is to talk to y'all. I'm grounded from everything I have, so I can't do anything. My dad forces me to do nothing but schoolwork but I'm coming up on my semester exams and I'm scared my dad is going to force my to clean non-stop so I kind of don't want to do my semester exams. I have 4 of my classes at my semester exams and I'm working on getting my other 2 classes to my semester exams.
So if anybody could please give me advice on how I can get my computer back as fast as possible, please, let me know by answering / commenting.
I know this isn't for homework, quizzes, tests, exams, etc. and you can report me for this, but I really need advice. :(

For those who took the time to read this, thank you so much. I really appreciate it.