You might like Esperanto if you like computer languages.

There are actually quite a lot of speakers of it worldwide. The most of any artificial language by a long way, anyway. There's also a system called "Pasporta Servo" where Esperanto speakers around the world offer to let travelling Esperanto speakers who are visiting their country stay with them for free. So if you speak it well and don't mind staying with strangers, you can get free accommodation in lots of places.
Not really, I'm an amateur.

I know lots of people who know way more about languages than me, and who speak lots of them fluently to boot. But foreign languages are definitely where my main interests lie.