OT: Get out of the habit of saying "I built this in 3 days". Most of the time, people say that because they're nervous about being judged. Ironically, "I built this in 3 days" probably exclusively attracts the kind of attention that benchmarks and judges what you built; either way, it's hard to see how it constructively promotes anything you're doing or planning to do.

Get used to people tearing you down. HN is full of people --- most of whom have never built anything --- who tear new products down for sport. But the world is also full of people who will be dismissive in more insidious ways. If you're going to launch products, build up your thick skin now. The industry is full of people who launched less impressive things than this, promoted their work ruthlessly and without neurotic humility, and later went on to run the table on their competitors.