The problem is many people don't know how to learn, or haven't developed good habits-of-mind. That goes under the terms executive function and metacognitive skills. They are force multipliers throughout your education, and you're right that schools don't teach them.
If I can do it, so can you! It just takes a few years developing those skills, and ideally a little bit of mentorship to point you on the way.
And no, people don't learn differently. That's one of the biggest lies fleeced upon us. The reference there is: "Learning Styles: Concepts and Evidence." Turns out we all learn more-or-less the same way. Many of us believe we learn differently, but we actually don't. A big part of executive function is differentiating between activities which /feel/ like learning, and ones where skills actually grow.