I feel like you're trying to fight an uphill battle. I find it's always easiest to learn in a way that motivates or invigorates me.

For example, I wanted to play games with my friends so I got into hosting a Minecraft server. It was hell at first to learn all the individual pieces, but I was motivated and it led me down the path of learning networking, basic server client architecture, and performance monitoring. That kind of spiralled out into making my own plugin, too. Despite the fact that I never ran a server with more than 5 active players or finished my plugin, it sent me down a path learning tons of new stuff because it was fun for me.

I transitioned into webapp development later on by trying to make an idea I had come to life. This was well before I had even heard the word "startup" and I had no business sense, but I wanted to make something and was very motivated to hack my way through it. I didn't finish that either, but I still use those skills I learned today.