I'm always so worried like "corporate has their foot on my neck, I need to make sure I logged enough work to Jira and am showing enough sprint points worth of delivery week after week".
I can't imagine just being "free" and getting to do what I want/when I want/at my own pace/investing this level of time + effort + resources into passion projects...
I guess it's not a super big investment money wise. Probably $100-$200 in prototyping materials. But how much time are we talking? A few hours a day/night on average after work? For... years?