@ColourfulCircles, there are a few cases of parential alienation I'm aware of, including two I know personally. I would even go so far as to suggest I believe I know exactly what you are talking about.
You are a fantastic person. I see you and you have nothing, absolutely nothing, to feel guilty for. Not saying you do, but just in case.
You have already been through so much and oh how much better the world would be if the bad ones got their comeuppance and the good ones thrived. We sadly don't live in that world.
But we do live in one that is worth living in. We have to push for our own life worth living in. That's not to say family and friends can't help. They can be an absolute rock, but it is a personal path to tread.
It sounds like you have some great things going for you with the dance shows, cat and dogs! The tutoring in particular sounds brilliant and so lovely to be surrounded by love from others like that.
Like you say, it is a big thing to get used to, but you can get through this and nothing is insurmountable. The reading books by people who've been through great hardship sounds like a wonderful source of inspiration. We all need hope. You are carving out a new life for yourself, and however fucking harrowing that is for you, you can (and are) doing it.
Allow yourself to feel pain. But also, it's opposite. I'm not really sure what that is?! Love, joy, laughter. So many things that you owe it to yourself to find. We are with you here on this forum to help, alongside your friends.