You ought to check out Articles. I myself find TONS of help in the Coven Articles (I only read the 5 star stuff). It has been put there by a person, and rated by others so I find it more reliable. Im sorry for what you are dealing with. I have serious mommy issues bc of what my mom done. Dad wasnt there.
Anywho, astral projection is for the more advanced from what I gather. I would get a knowledge base on it first. And before any ritual meditation plays a big part. There are great articles on BOTH of these subjects in Coven Articles. I reccomend spending time reading them and continuing more research via the internet. Chanting, in my opinion, is the easiest part...assuming you believe and dont doubt your work after.
Perhaps look up protection spells for yourself and drive out negativity the best you can.
I know it sucks but you can't just change a person. If that is your goal know that is simply not possible to change them overnight, or even over time via magic.
Perhaps an intervention should be held by family members. Professional help, and them making a choice is the best bet.
There are a lot more knowledgable people on here, so I hope they see your post. As for me, Ive dealt with a lot of stuff your experiencing or stuff equal. You cant change others but if you need someone to talk to, perhaps I can help you. You really need to take care of you until you are able to get away from the chaos.