Learn as much as you can because you don’t know when they will be handy.
Where do I start?
Find interesting topics and people. Read their bios on Wikipedia.
If they don’t have a page on Wikipedia, check your own country’s, favorite singer’s, or city’s Wikipedia page. Read what you are interested in, then move on to other topics.
Do you still want to learn more?
Watch Youtube videos about that topic or start to related people on Twitter ( make a private list for yourself and check what they are sharing)
There is no time to get bored in this learning flow. Because you are choosing your own topics, interests in your manner.
“The more that you read, the more things you will know. The more that you learn, the more places you’ll go”
Dr Seuss from I Can Read With My Eyes Shut