I've talked about this in a lot of my videos, but I got started rather by accident.
My father has been a long-time fountain pen user. He had a Sheaffer fountain pen he purchased back in the mid 1970's, and had used it for years. Then, when visiting Pike Place Market with me in Seattle, we discovered the "Market Penmaker," a gentleman who makes and sells turned wood pens. (These days, he only does ballpoint pens.) My dad got one and liked it.
A few years later, my mother asked me if I'd go to Pike Place and get him another pen for a birthday present. I did, and while I was there, I started talking myself into maybe getting a fountain pen of my own. The next week, I returned to the market and bought my first pen, this one made of Amboyna Burl wood. I justified the then-exorbitant $65 price by saying I would use it to write in my journal and it would last me forever.
I ran into a few problems with the pen (I would call it ink starvation these days) and went online to try to find more information. That's when I fell down the rabbit hole. I got sucked in the videos of Brian Goulet and SBREBrown, and spent hours trolling the forums. It all went downhill from there.