I also found that people tend to talk about 2 things in Esperanto: Politics, and Esperanto. I'm not really into either of those.
And typing in Esperanto usually required some kind of IME, which I found to be tedious or annoying.
I contrast this to learning Japanese, which I was much more successful at. There's tons of media that I enjoy, plus some things that were never translated that I still want to read. I was able to talk about non-political, non-language things with random people on the internet. And although I was still forced to use an IME to type it, at least there was a true reason for it.
I recommend people learn a second language, but I recommend they find one that they'll either consume a lot of media in, or have a lot of people they can talk to daily and will actually use.