My first side hustle was different to my first job (paper route). Aged 10 or 11 I used to go dumpster diving behind the local newsagents, liberating the unsold playboy magazines and selling them to the older boys at the local high school who were too chicken to buy them in the store.
I diversified into muscle car magazines, but this proved to be a hazardous pursuit as the older rev-head boys would as often beat me up and steal the magazines as pay me for them.
Before long I stumbled onto a far more lucrative trade, magazines targeted at teenage girls (beauty and boy band magazines). This line of business saw me much less likely to be mugged, as well as making me very popular with the ladies. I didn't really understand why this was a good thing at the time, but came to greatly appreciate it as I got older!