I am so so sorry and sad to read what you're going through. As with all things this pain you feel WILL pass. I left when my daughter was 3, and it was terrifying. It's terrifying to be so alone. I faded and so had occasional contact with my mother - that's gone now she has branded me an apostate, and honestly, it's easier without her - but it was the worst time in my life. You are strong for leaving, and for seeing it as it is. Firstly, keep this knowledge you're strong close. You're loving for not rejoicing in other's pain. You're also seeing the good in others, seeing that people with true Christian values help others.
Your worries about your daughter - she will see them as they are. Your influence and experiences will open her eyes, she won't want to join them. She might be conflicted for a few years, and that's going to be a tough one. My daughter is now 11, and she detests the witnesses - her father is still in - she sees the hypocrisy and lack of love and has made her own conclusions. Kids are smart.
It does get better. Try and find ways to make new friends. I volunteered for a charity after I left and it changed my life, opened my eyes to the good in the world and helped build a new set of friends. Now my life is good, you'll get to that stage too, you just need to hang in and I know it'll be painful and awful at times, but you've done the hardest part and there are lots of people here who have your back as well.
There are lots of phases people go through, it's not dissimilar to post traumatic stress at times, and you've lost your family, so there will be the stages of grief too. I was numb, sad, angry, doubted myself, distrustful of others, but gradually have learnt to let it go, and in the main, it's ok now. You'll get there too.