Learning Math On Your Own

It depends on the person. I prefer self-teaching, but as a math tutor, I’m glad most people need a teacher. People also often don’t put in the work. If you take the time to read through every word of a lesson, copy all the examples, write the main ideas and definitions from the lesson, then attempt some problems, it will likely go much better.
For a self-learner, it's critical to pick books with exercises and solutions.

 

This is precisely what I've been doing on my own after the college years ended long ago.