When I was 19 I tried an IRC Vampire the Requiem game. I got banned after arguing with the admins about the rules (in retrospect I was right about how things worked but they'd already house ruled it and I should've just gone with it). In response I wrote a whole website for managing character sheets, and a connected IRC bot to handle dice rolls, and pull things from character sheets.

I did all of that, and then proceeded to run a terrible vampire game on IRC for a couple months. The code was all in PHPNuke so it's useless now. But it taught me a lot about coding for the web. During that time I showed my work at a job interview as a software dev, and I got a job while still in college. But as part of the coding questions, I learned that you can use sql to join tables. I went home and started rewriting a lot of stuff, but the game died before I was finished.