Is quitting your job for your own startup idea, when working in tech, really that big of a deal? Especially if you are a software engineer? You'll probably end up doing the same thing as on a corporate job but for yourself while learning a lot of new things about building software (marketing, sales, design, etc.) and about yourself (grit, character, etc.). You are still gaining experience. If shit hits the fan, with all digitalization going on everywhere, finding a new job won't really be that big of an issue.