I’ve taken maybe a handful of online photography courses, mostly in speedlight training because it was so new to me. Over time, I learned most online photography courses are like online Photoshop courses: one trick ponies to only use when you really need it. And for most of those, as CJ says, there’s free videos on YouTube to learn techniques.
No, my “education” comes from the How To See end of the photography spectrum. Specifically, it’s learning how the great photographers of history have seen the world and translated it through their pictures. When I learned how Callahan and Metzker saw the world, my photography voice and vision (not techniques!) improved.
The best photography lessons come from photo books and projects, not one-off online classes. Find a photographer you like, go grab their book from a library, and spend some time with it. If you really like the book, buy it, and you’ll be able to keep it forever. You can share it with friends. You can revisit it over time and rediscover the lessons.
Libraries provide books to anyone, just about anywhere, for free. Through interlibrary loans, if they don’t have a book, they can get it for you. That’s a librarian’s job! They can’t wait to help you find a book. I’m lucky enough to work at a university where I can go online, pick a book, and it shows up at my office a few days later (one of the many reasons I love working in higher ed).
Now, if a photographer doesn’t have a book, visit the Projects section of their website and spend some time with it. Look at those images full size. Read the text. Find out the why. Hell, send them an email and start a conversation. Don’t be shy.
If you’re a professional photographer who needs to solve a difficult problem, maybe something like CreativeLive will work for you. Maybe it’s worth the money.
But for us hobbyists, a book is a better investment in time and treasure.