I’m noodling on a side hustle – a business that I run while still maintaining my day job. That’s my definition. Wikipedia redirects you to “Part-time contract” but that’s not what I’m doing. It will be something related either to my profession as a telecom sales engineer and information security professional, or my hobby of amateur radio.
BTW, if you buy the book using the link above I THINK I’ll get my first commission from the Amazon Affiliates program. You don’t pay more, it’s just the way of the side hustle.