Our product is an automated machine learning product. If I had to redo one thing, I would have focussed on web application part from day 1. Instead we focussed on getting data science part right first.
I feel shame from my answer because everybody had warned me about this... but I would start promoting it sooner (before product is done) to get more feedback. Would have saved a bit of time.
Marketing. 1. Setup landing page then site (buy template, use SEO ready software), 2. Setup email signup form, 3. Start talking about it anywhere you can Reddit, Twitter, IndieHackers, etc... Funny all this can be done in 1 day and the breadcrumbs begin. π
ScreenDust