Don't psych yourself out on choosing a path. The commentor above gave you a target - Full Stack Development, or similar as a jump off. It's web development focused but also integrates really well with cloud technology. If you already have a memory of CSS, HTML and some Java you're already ahead of others. Check out some of these links and see what you think. You did it before and have the discipline to do it again, so maybe use this as a starting point.
Full Stack UK Salary https://uk.talent.com/salary?job=full+stack+developer
Full Stack Developer How To: https://www.freecodecamp.org/news/how-to-become-a-full-stack-web-developer-in-2020/
Coursera Course: https://www.coursera.org/professional-certificates/ibm-full-stack-cloud-developer