I started a side project last year and it's been a fantastic experience. It's an opportunity to "scratch an itch" that the day job can't provide (which for me is doing whatever I want).

I had some frontend dev skills but didn't have the backend chops, so I hired someone on Upwork. I'm pretty busy at work so getting someone else involved is key (If I was by myself I'm not sure I would have stuck with it).

It's been a year and the app is doing about $3k/mo in revenue.