How to launch my first startup on Hacker News

Hi guys! I and my team (of 3) are building an application to make online lesson more fun and engaging. We're recruiting our first users for the MVP expected to be launched at the end of this month. I have heard about many starups successfully launch their product in Hackernews but I don't really know what makes the difference (besides the quality of the product itself). This is my very startup, I'm absolutely open to learn and any advices are really appreciated! Thank you so much :)