Leaving abusive relationship

hi Im 45 male with several chronic illnesses. I have lcwra as part of a joint claim for uc. I cannot take any more of narcissism im faced with everyday and im looking at starting out by myself. I believe leaving will protect her more from the screaming im faced with everyday.
my question is financially where will I be with uc and lcwra. I have a claim for pip which I was advised to do by two of my clinics I am being cared for. Before I was ill I was a self employed carpenter with employees and a Workshop and have lost it all. I have Huge debt and no assets.

I work self employed as and when my conditions allow. I really want to make a custody claim for my daughter once I move out but know the turmoil put on her will be awlful. My daughter will be 16 in 18 months and wonder if a custody claim would even process in time. I have tried to keep this as on topic as possible and will not go into more detail here

many thanks

Gary