How did you leave your husband when you had little kids ?

I’ve a newborn and two year old. I’m not working since I just had the baby.

How do I leave my husband ? What plans do I need ? Obviously money but aside from that ? I don’t have family I can go to I have a friend I can go to but I can’t take my kids out of state.

How did you successfully leave your husband or bf etc and start over ?

What helped you ?