How long did it take for your website to get fully indexed by Google?

This is like a waiting game that can make someone lose their mind. You go through stress to publish content, you submit sitemap and still Google ignores you like your site didn't exist at all. Some people say it will take 2-3 weeks for google to start showing yours site in search results, others say it will take 3-6 months for new domains with zero authority. What do you think?