Advice/Experience on Giving up Work

Hi all, I'm new here and wondering how other parents have managed when quitting work to become a full time carer.

I've always managed to work around my child's needs by receiving childcare help from my parents but they are now getting to the point where they are finding it harder as they get older.  Coupled with the fact that my child will be leaving school this year (she'll be 16) with no place to go yet I feel I can no longer work and provide the care she needs, my daughter obviously comes first so the current job has to go as I work 12 hour shifts.  All other family members work full time so no option there.

I've tried finding work that's within the hours available but there isn't anything, plus I can't start a new job as the hours may change in a few months and I'll have to leave that job.  I need to be on call for her also as she has no road safety skills and is oblivious to danger, so I would need to accompany her to places.  I've considered outside care for her but I work a minimum wage job so it would cost more to supply care to her than if I just finished work and be there for her myself, which is also my preferred option, she's adorable :)

I'm hoping to receive financial help to cover the loss of income but that is also uncertain, everything is very uncertain at the moment.

I would love to hear from anyone on their experiences with a similar situation on how you dealt with it, are dealing with the change, and any advice you can offer.

Many thanks in advance.