I don't know what to do with my life

I am currently 25 years old and live in Spain. I only have vocational training (not sure if that is what it's called) in administration, which would be basically being an office clerk.

Currently I'm working at JD Sports, I like it, but it's not great paid. I don't think college is an option because I have never been great at studying and 4-5 years is too much anyway.

I have thought to do the CS50 certificate from Harvard but Im not sure if its even worth it.

Any help is appreciated, thank you very much.