Congratulations dude.
It's been a little over 10 years since I got my first official job out of high school. I had joined a work training program in high school and it helped me get training at an auto parts store that ended up not hiring me, so that summer I spent most of my days searching for work with my job coach and I found one that I stayed with for about 5 and a half years before it got shut down by the owner. It was a local Mom and Pop supermarket and I was a bag boy, basically what I did was bag groceries, collect the shopping carts from the parking lot, and any janitorial work that had to be done.
Now I work at a big chain retail store and I have been there for about 2 and a half years.