I think we under-estimate how many people are miserable because they have no enthusiasms, no hobbies, because they gave up reading and quit learning when school ended. It's shocking how much studying a beloved subject elevates your mood. It will transform your life. 

For the past year I've been doing focused reading on medieval literature, English history, the folklore of Scotland and Wales, and I can't express how just learning things changes a person. It will make you more interesting. You will fall in love with this world.