You can only learn what's available; you can only learn from what is available.
After that either you like to learn or you don't. Most people don't unless they are forced to or driven by the lure of greed, "College graduates earn a half million dollars more over their life time than high school dropouts." If it weren't for greed a lot fewer people would bother with the three "R's".
Formal education relies heavily on book learning and tends to eschew "lab" work.
Non book learning is growing scarce and in my opinion will grow more so. One woman I knew became a top mechanic: at 3 years old she was handing daddy a half inch open end wrench when he asked for it. Another became a carpenter: at 7 years old she was carrying shingles up a ladder to her daddy. Try doing that in today's climate of anti children.
I'm self educated, the only way I could get educated seen as I'm a grammar school drop out. No way to prove either one but I think they both show. Libraries are wonderful for people like me. I've devoured several.
I believe most self educated people are book learned as books are much easier to come by than people with experience.
But I'm looking at Youtube, Expert Village, Howitworks.com and similar sites.
I believe cyber education is coming at us. Informal, unstructured, unplanned, and who knows what the people who are putting it all together in their own unique ways will come up with.