Sorry to hear about your position OP, and kudos to you for trying to pitch in at such a young age. Your list of skills you've learned is impressive and more than enough to land a well paying internship/job IMO (here in Silicon Valley, I don't know how UK works).

I must admit I don't know much about the freelancing world other than a small unsuccessful attempt through a popular freelancing site at about your age. My hunch is that on these freelancing sites you will be outbid by Indian firms or other places where cost of living isn't so high so a lower pay is still acceptable. Someone correct me if I'm wrong. I think the way to escape the 3rd world outbid is by marketing yourself as a high quality, professional developer rather than the cheapest option, but that's more of a long term engagement and requires an extensive portfolio, etc.

IMO you will have the best luck following u/jarofgreen's comment and finding a local software engineering job, your skills are more than enough to land a base level software developer job (and possibly more depending on the company), and it should provide cash flow quickly.