Amazing, stunning, overwhelming: there is no superlative powerful enough to describe the diversity or sheer amount of what you can teach yourself relying on sole web resources. One can only wonder how it is still possible that the world is such a mess in spite of so much accumulated and available knowledge about everything and nothing ...in spite or because ... when you think about it ... with so many bulls bullying so many cows there has to be a lot of bull lying around.
Anyway, the sources listed here (most of them at least) won't give you a diploma and, should you delve into them, will most probably -if I am to believe my own experience- stray you away from most life sustaining jobs ... Ô the beauty of gratuitous wisdom!
To try and find my way around so much whirl-winding, mind-blowing sapience I've used the Dewey decimal classification, the bits and pieces I gathered along the way at any rate*.

Audio, video, text resources

000 - Computer science, information & general works

100 – Philosophy and psychology

200 – Religion

300 – Social sciences

400 – Languages

500 – Science and Mathematics

600 – Technology and applied science

700 – Arts and recreation

800 – Literature

900 – History - Geography - Biography