I began when I was 23 and was living in the USA (at then I was doing my masters in music)
All started with, believe it or not, CIGARETTES!
Yes! I used to smoke and I saw one guy on the streets using an electronic cigarette.
I got so intrigued by how that little stick could put out vapor that I went to read about it.
I bought some modules and built my own e-cig. (mainly following instructions from the web and with the help of you guys and the reddit community)
After that...Ohms Law, books, transistors, Op-amps and the whole madness.
Because I learn the theory as it is needed for the practice, it is very common for me to have very basic questions while doing a much more complicated project (if compared to the question). For ex: building a discrete symmetrical power supply but having no idea how to wire the 3p2t switch.
Today Im living in Brazil, where Im originally from, and trying to cope with the insane importation taxes that makes buying components a hassle.
But, I love all of this!