were your projects in spaces you were familiar with? I feel like that makes the dart less random. Also I feel like it's hard to get customers/users on calls
well they were all websites so they had that in common but not much else. I would recommend starting off with an app store of some kind since getting initial customers is a real pain unless you already have some lined up due to past work experience / networking. That said, with enough time and screaming into the void you will get someone to walk through the door. Best to ask them as many questions as you can while they are hanging around!
you can email me if you want: jason[at]zigpoll.com
Ideas came from building something that I wished existed. Honestly I didn't overthink any of them and I'm glad I didn't. If you do too much market research it tends to make your vision seem less exciting IMO.
Either way my whole point is to just iterate on your initial idea for long enough that it goes from being "your fun idea" to "your fun idea that people are willing to pay for". Then just repeat that loop until you retire :)