This site is great if you already know the basics and have a specific outcome in mind, but can’t figure out how to accomplish it.
TheCodePlayer is where you can go if you want to learn how to accomplish particular tasks or effects. A huge majority of the videos they offer are free for immediate viewing. A small number you will need to subscribe to access.
The site is ideal if you already have a result in mind. You only need to search for your desired outcome and watch the video. Again, it is entirely free. Be wary, however, of ads, as they often need to be closed one by one so they won’t obscure the video.