What qualifications do you have? What are you good at? What do you enjoy?
What does "childcare friendly" mean to you?
Are there any limitations on what you can do because of your mental health?
It's a good time of year to pick up Christmas temp work in warehouses, fulfilment centres, supermarkets, Royal Mail etc. Contracts usually run from now until late December or early January.
That would give you a chance to build up some experience, employment history, a reference, get used to the workplace again, build your confidence and maybe obtain a permanent role at the end if you did well.
Christmas temp contracts for warehouses are often through agencies, you'd have a set shift pattern so you could arrange childcare (eg day shift M-F) and often the agency will run minibuses to/from site for a small fee. Think Amazon, Aldi, John Lewis/Waitrose fulfilment centre type work.
John Lewis/Waitrose are supposed to be a good employer if they have a warehouse/fulfilment centre near you. Amazon advertise that they offer apprenticeships to all warehouse staff but I don't know competitive it is in reality to secure one.