I used to spend a lot of time on Duolingo just to get to the top of Diamond league, until one day I realized that the Diamond league meant nothing to me and there was more effective way to learn a new language.

By the way, is it just me or spoken Japanese was so much easier than spoken Spanish? It was just so hard for me to understand what a Spanish speaker says even though I had no problem reading the same content. Yet somehow it was much easier to understand spoken Japanese.