Using a tablet. That part is not actually that unusual. There's lots of educational apps available. And educational videos on Youtube. My oldest son taught hims

Using a tablet. That part is not actually that unusual. There's lots of educational apps available. And educational videos on Youtube. My oldest son taught himself English as a second language by putting Minecraft on English. Minecraft has excellent language support, and once you know the game well, you already know what everything is in your own language, so setting it to another language is an easy way to learn some words.