Moving out

So I’m 23, and currently live with my sister, niece (3) and nephew (1) we moved out of our moms around 6 years ago. I’ve lived with a few different family members now and have been living with my sister now for two years. There’s too much detail to explain but long story short; I’ve been thinking about moving out and living on my own, I’ve been slacking this past year and I’ve struggled with depression and anxiety for years and it’s getting to a point where I’m just using it as an excuse to be lazy and not do anything with my life. And I’m ready to make a change and really commit and go after my dreams. Things at home are rough, I love living with them, but it’s a lot, I’ve taken on the roll of their father because he’s not as involved as he should be so I’m raising the kids with my sister and it’s definitely not easy. I’m constantly watching them whenever my sister wants to go out and I feel like I don’t have a life of my own, like I’m the one asking if it’s okay if I go out, constantly having to cancel any plans I have so that my sister can go out. I just feel like the energy is very negative whenever I’m home, and the only friend I’ve had by my side this past year is my amazing boyfriend which unfortunately lives 17 hours away. I’ve isolated myself for a year and honestly feel like I’m going crazy in this house. We are supposed to be moving out into a bigger house and her current boyfriend is supposed to move in with all of us, idk how I feel about that because I lived with her and her ex and I felt like I had no privacy and I feel the same now. I’m really scared to live on my own but it could be a really good thing for me idk what to do...