Same experience. I am not familiar with Instagram containing cryptocurrency topics (since I don't open Instaram that much), but maybe there were few accounts intended to post for something like that. I also look into forums and websites which I think is more reliable if I want to learn more about Bitcoin and crypto. Since there are many social media platforms now talking about bitcoin, social media may be one of reliable source of knowledge. Just always make sure that the accounts you follow and read articles to is reliable too, of course.

Well, I believe it depends on each person how they did found out about crypto, and all matters that you apply to yourself what you have learned from those.