Well done, it is scary going out on your own especially with a baby.
I was similar- ran from abuse when my daughter was a baby.
It was scary, especially at the beginning but she is 17 now and life has been genuinely great. My daughter is amazing and I am still happy that we get to come home everyday to a warm bright flat where nothing is broken and we can do everything our way.
I think, especially when you have been controlled for years, it never stops feeling good that you get to make choices.
You don't need anyones permission to enjoy life with your child.
Rollercoasters, milkshakes, swimming, face paint, costumes in public, silly books, sleepovers, glitter, colourful wall murals, an extra bedtime story, taking a mental heath day from school if needed, ears pierced, dyeing her hair, picking her up if she wants me to even if if its late, her music on the kitchen speakers, going to the cinema, gigs for bands we like, festivals etc generally life is fun.
Single parenting forever can be hard, there is no one to share childcare with or to help you with regualr parentimg tasks.
But I would 100% rather do that on my own than with him, even just because I can have fair rules and consequences and parent in a responsible way, rather than with fear. I have made lots of really good friends who have been there for us. We found community where we live and its been really supportive
It will be okay