I had always liked semi trucks, what boy doesn't.
When I was 13 I was trying to get to another town, so stood on the side of the hwy hitchhiking. A nice older couple picked me up and gave me a ride as far as they were going, the man driving said he was a truck driver, and would help me get a ride from there. Took me to a truck stop, and loudly announced that he had just picked me up an hour ago hitchhiking, I was polite, and needed a ride, so would one of the truckers please take me north with them. A guy said he would be leaving in 5 minutes, and happy to give me a ride. That was 1983, and I rode about 9 hours in that truck with the man. I must have damn near driven him crazy with all my questions, but he answered them all without complaint. I was just so eager to learn more about this fascinating career, and hence all the questions. Well I was hooked, I wanted to be a truck driver from that moment on. When it was time to head back south about 6 weeks later, I walked 6 hours to get to a truck stop, and began asking the people who were there fueling up if i could get a ride south. After several No answers, I got a yes. I didn't want to just hitch hike back home, knowing that I would just end up riding in a car, when all I could think of was riding in a big truck. That guy was amazing, and showed me so many interesting things to a 14 year old boy, like why he thumped the tires, and checked the chains on his load, etc.
So when I finally became an adult it was an easy choice for me, I wanted to drive a rig.
Boring story sure, but that was how I got into it.