I think Wendy's Gnome Shop is an insane example of someone who started from 0 into a million dollar side project using only crafts she hand made. You can read about her story and how she did it.
You could also start small with an Esty shop. Maybe post on a few local Facebook groups or even attend arts and crafts fairs in your local area. As far as the Esty shop, I have a friend who made niche IT related gifts and he started solely on the Etsy platform. Decent side income but he was never able to make it a full business.