To add some fun to your language learning, I recommend you try out websites like Duolingo, which gamifies study-time. I also use LyricsGap, and LyricsTraining to learn the lyrics to songs in my target languages, which keeps things interesting and more fun as you learn.
Here's some information about the polyglots I mentioned in the chapter:
Khatzumoto is a polyglot with a focus on consuming languages--which means you can usually find him watching dubbed versions of Star Trek, reading Manga, or otherwise being immersed in Japanese media. He is an avid supporter of the “input” method, which is more focused on consuming language materials than on speaking (which is my own preference).
You can hear Katz discuss his approach in my one-on-one interview with him here!
Moses gets off on talking to people. He has the widest range of languages studied of any person I’ve ever met, and he’s most famous for his “leveling up,” which involves going to a public place, spontaneously finding a native speaker, and using his target language with them. This can be done anywhere. The last time we hung out, we leveled up in a dozen languages in a mall in Ohio!
You can hear Moses discuss his approach in my one-on-one interview with him here!
And here's some further reading to pique your interest and keep you inspired:
The smartest decision you will ever make to achieve fluency
How ditching perfectionism helped me speak Spanish all evening for the first time