Just randomly remembered my very first experience with RPing, which doesn't actually count because I didn't do anything: it was on AOL, before the WWW, and back then it was called "simming", and I went into a Star Trek sim and they told me to be the captain
I was like "Okay" but then I couldn't figure out wtf to do so I just left the chat room 




Didn't do anything like that again for maybe five years? When the WWW was finally around and I started doing a play-by-post RPG on a forum.
For those there were gamemasters who ran the story so it was easy for me to just run a character (or two...or twelve), and I did that for a few years and then I graduated college and quit basically everything until 2014
