If you want to learn something, go and write about it. I like writing because it forces me to research and deep dive in different concepts.In addition to that, you are sharing what you learn with people.
Once upon time, I decied to learn HTML and CSS. Since I only do design work, I thought that adding this skill will make my life better. After months of learning I started seeing the positive side effects of this decition. I’m really happy today that I made it.