I am so sorry.
Try to not focus on your family life, if you can? Try and talk with your mom, have some bonding time alone together, spend time at school, etc. And remember, it seems like your dad knows he isn't stable and is trying to protect you. No matter what happens, you should remember that your father does love you, and your mother, and wants to protect you.
Also, it may be hard, but try not to blame him.
Some stress tips I like:
Reading!
If you are anxious as well, listen to an audiobook so you can fidget, eat, do whatever you want, while still reading!
Bath
I love baths, and, bonus, you can listen to an audiobook in the bath! it is so nice to hhave a nice, lavender bath, and candles, and a great book playing....
Focus on school
transfer all your nervous energy to studying! Plus, it will get you good grades, your parents might like that! not my fav, but if it is mindless math problems, YOU CAN PAIR IT WITH AN AUDIOBOOK
Cleaning
sometimes, it feels so nice to just organize or clean up your space. also, can you guess what I am about to say??? YOU CAN LISTEN TO AN AUDIOBOOK-
And KT
this one is self explanatory, on of my favorites! (although, minus a few points bcuz you can't listen to an audiobook :(
I hope things get better for you
and always remember, the key to life is
audiobook