Wow that is long hours! Have you considered agency a work. I’ve been in two roles via an agency many years ago (whilst looking for something more perm and suitable) and found it really flexible and well paid x
I used to do this job, I changed to work with young people in care 5 years ago, the hours are still long (I'm at their house 0930am and finish at 10am the next day, if no drama can sleep midnight till 7am) But means I get my full time hours out the way in 2 days. Also working in an outdoor centre was pretty transferable to working with young people in care as you'll have plenty of experience working with all ages
Honestly, you would be surprised by what jobs you can get with no qualifications, just apply for anything! Is there no way you can have set shifts at work so you can get into a routine? I currently do 3 long days 8-6 and then 2 8-12 so it's not so hard.