Hello. As far as I know, my friend had an experience of studying on one of the British online platforms, I think its name is similar to ELVTR. She mentioned that they offer different courses there and give certificates. Unfortunately, I don't remember the exact name. But you can go to uk.elvtr.com/ and look up information about their programmes yourself. I think you will find answers to your questions there. I apologise that I can't be of more help.
I never had any doubt that after school I should go to college. This is not only interesting and exciting, but adds the necessary knowledge for mastering a future profession. I chose a technical specialty and gained skills through online courses at Oxford University at Cherwell College. All this came in handy during my internship. The teachers were wonderful and always willing to help with difficult questions. I also made great friends in college and created valuable connections for my future career.