Ideally, what you want to do is to choose a side hustle that you’re passionate about (preferably a hobby), is relatively easy for you to do, and is something you’re deeply interested in.
Yes. Yes. Yes. "If you do something you love, you'll never work a day in your life!"
I'm a HUGE advocate for people making a living with their hobbies and passions, and many still seem so unaware of how the internet can make it a lot easier! It's still always going to take a ton of hard work and dedication, but I've always said if you want something bad enough, you'll make it happen.