Every subject is much easier than the people who wish to make money teaching it would have you know. So, for every single subject that can be systematized, there is a systematization that allows you to get 80% percent of the power with probably 5 or 10% of the effort. So the key question is that you have to prove that you have the superpower to rearrange the subject, to disintermediate the people who get paid for teaching it – which will always push you towards mastery, which is a question of getting the last 2 or 3% out of the system. And so the good news is that you can rearrange any subject to learn most of it very, very quickly. The bad news is that it will feel terrible because you will be told that you are doing the wrong thing and dooming yourself to a life of mediocrity as a jack of many trades, master of none – but in fact, the problem is that the jack of one trade is the connector of none. Good luck!
In mathematics, in physics, people are concerned with what you say, not with your certification. But in order to speak about social reality, you must have the proper credentials, particularly if you depart from the accepted framework of thinking. Generally speaking, it seems fair to say that the richer the intellectual substance of a field, the less there is a concern for credentials, and the greater is concern for content.
Every person has two educations, one which he receives from others, and one, more important, which he gives to himself.