Free courses and free contents. Build a skill. Invest some time and litt up.
1) GCFGlobal.
200+ courses ranging from MS office to Cyber Security.
https://edu.gcfglobal.org/en/topics/
2) OpenLearn
Courses on , well almost everything.
https://www.open.edu/openlearn/free-courses/full-catalogue
3) Alison
Free and huge catalog of courses.
https://alison.com/