Admittedly made my life harder, what can I do?

I'm 23 and dropped out of university. I have tried repeatedly to do the final year but I was faced with mental and physical health issues. I don't think it's that much of an excuse, I just wanted to explain why I found it so hard to complete. I didn't want to spend more money on another year, it would be detrimental for me. I can get a diploma for finishing the second year, but that's it. I also have no job and no experience, I don't really know how to start or where I can start.
Would I need to do university again at some point? Because of my issues I think it's best to just stay online. I found something with a fast track that I could do in 2 years. It would mean my parents will have to fund but it's £20k overall. However the problem is I don't think I've recovered from my mental health issues. I will just be applying during clearing so I can see how I feel closer to the course start date.

The main thing I want right now is just some work experience. Is it possible to obtain work experience in more serious jobs? I don't mind doing internships for free. I just don't feel qualified enough to even have the chance to do something for nothing.
Should I just work multiple jobs? I feel very guilty for my life decisions, and although I don't owe anyone, I'd like to at least pay back a few thousand.

Sorry for overloading a lot.
I'm definitely going to be trolled but I don't really care. Just going to ignore it so go waste your time idrc.

What sort of work / work experience are you looking for? The least vague phrase you've used is "more serious jobs", but even that could me referring to a huge range. Doctor? Lawyer? Accountant? Teacher?
Also you say both, "I don't owe anyone" and "I'd like to at least pay back a few thousand." Who are you paying back, if you don't owe anyone? Or are you referring to the 20k that you'd need to ask your parents to fund for "something with a fast track". Again, what is this course? What is it a fast track to?
Given that you say, "it's best to just stay online", would I be right in saying that your plan is to do a fast track distance learning course, then try to land a fully-remote using that qualification, pay back you parents (at least in part) and generally avoid going outside?

Forget uni for now. Get your mental health sorted first. See your GP if you haven't seen them about this already and make sure you have all the right support in place +/- medication if needed. Once your mental health is in a better place, everything else will feel much easier to deal with.
With regards to work experience, if more "serious" jobs are not working out, have you considered volunteering? You can get loads of transferrable skills from volunteering and it looks really good on your CV too. Plus might be easier to commit to for now if mental health is currently a struggle.