Hi,
It sounds like you've done an amazing job so far and are doing things correctly. This is a perfectly natural feeling that every (good) entrepreneur would feel. In order to succeed, all successful entrepreneurs have had to put this feel aside, and take a leap. That said, this should be done in stages, and after validating your idea (see my previous answers on Clarity - https://clarity.fm/assafben-david - for a detailed explanation on how to validate your idea).
I'm in academia, and have helped numerous edtech startups, so if you need more advice, feel free to give me a shout.
Good luck
I've successfully helped over 380 entrepreneurs, startups and businesses, and I would be happy to help you. After scheduling a call, please send me some background information so that I can prepare in advance - thus giving you maximum value for your money. Take a look at my reviews: https://clarity.fm/assafben-david