I'm so behind on homeschool and idk how to get out of this fuckup

Hiii so this is stupid and I know its my fault already um but basically I had to go into homeschool like two or three years ago and I'm so behind I'm just barely about to get out of middle school and I'm 16. My mom was late on signing me up to homeschool after taking me out of public school so I was basically almost a whole school year behind when I finally was put into the program and then like a bunch of traumatic shit happened the past few years and we've had to move like three times between all of this and like three people in my family have died so its just been like thing after thing and so I just was a lazy fuck and didnt try to catch up on school and now my mom is finally trying to get me to do it and Im trying to get caught up because I feel so fucking stupid and my younger cousin is in the same grade as me now but its all so overwhelming and I feel like I just shut down after doing a few days of it and I know that's ridiculous but I don't know how to get out of it because like that's how my mom has always been and so like I don't know how to get out of that stupid habit and just any advice would be great please😭