I'd say showing your work on instagram is an essential in business thesedays, I've heard good things about facebook ads, it's highly targeted so you can choose your area, age, and loads of other details, ideally you should just use it to drive traffic to a website or blog whatever you prefer to sell your actual core product, there's still a lot to be said for making youtube vids if you have the balls to get in front of a camera and speak, again as long as you use it as a tool to drive traffic to your main site or products you are trying to sell. My guitar teacher/mentor told me that paying for google ads didn't do much for his business, so he stopped it, you could always try it and if it doesn't work move on.
p.s it's worth being on twitter as well, tiktok is supposedly exploding.