I am struggling with helping my brother get up for school and I need some advice on how to help him

Here is context (sorry its a lot):

We both struggle with our mental health. I am 18 and living at home doing college online, while he is 13 in 8th grade (in person). He deals with bullying and harrassment on the bus AND in school. There are so many reasons why he doesn't want to go to school. And then on top of this, he suffers from depression and anxiety. He can't get out of bed. I know this struggle too, because while I was in school I was this way as well. We are very similar in that way

He has missed almost double the allowed amount, and not many are excused of course. Our parents do not really help with this. They actually make him feel worse by scaring him. It is so bad that he could be taken away. This is so scary to me. I explain to him that is the last thing he wants but he truly just wants another home where he is treated better, too. 

On top of this the school he goes to doesnt have enough bus drivers, so they have to make a whole group of students stay after school an extra 2 hours while they wait for the bus to do their route. My brother is in this group. They don't do anything to make it fair, like switch kids that have to wait. You can imagine this makes him not want to go even more.

Anyways... I basically had to follow him around as he got ready (privacy was obviously granted) and walk him down to the bus to make sure he gets on. I am not capable of doing this every day because I am also depressed and most of the time cannot get out of bed at this time either. Is there any advice on how to make this better? My parents don't do anything.. so its basically just me helping him. And because I also struggle with this, I dont actually know how to handle this. He isn't able to switch schools due to other schools being full. Thank you for any and all advice and I apologize if this post is confusing at all.