I don’t know how it works in the UK, but in the US wr have what we call community colleges, which offer 2 year degrees, trade classes, and continuing education classes. Night classes in particular have a wide range of students - all ages and backgrounds. The classes generally aren’t too challenging, and are very affordable.
You seem very smart with excellent written communication skills, so I feel like you’d do well at a more challenging university. But if you’re nervous and maybe just want to get your feet wet, maybe you have something like I described nearby?