People ask: "I'd like to learn about XYZ thing. How?"
The obvious answer is to go get some books and read. As we all realized in school, that's the opposite of fun.
I use another technique:
Invent a way to "play" with it. In other words, find some way to make the learning fun.
For example, in 2012, I wanted to learn about angel investing. So, I just went and started making some investments with a small percentage of my net-worth. I knew I didn't know what I was doing then (and still have lots to learn), but made it a playful exercise.
So, that's it. If you want to learn something, find a way to just go play with it. Make it fun.
If it's not something you can make fun, then question why you want to learn it anyway. :-)