I struggled with trying to validate my product ideas in the past and gauge interest and felt frustrated when I found myself wasting a lot of time building landing pages and mailing listings. What has worked the best for you?
I often do two things before even writing a single line of code.
1- Share the problem on a relevant subreddit and see how they are solving it
2- Share in the #feedbacl group of the WBE Space and get valuable feedback form the members
Read the Mom Test. It has a lot of great tips on validating ideas with your peers via user discovery without inherently asking for feedback on your ideas.