Given the time, the discipline and the effort, you can learn and master anything. You can start with curiosity, learn, study, read and reflect. You could make mistakes, false starts and follow dead end paths. You could make outlines, throw them out, rewrite them, correct them and then go back to what you read and try to see if it all matches up.
You could do all of those things, and in the end you might succeed. You definitely would make progress and learn something.
Or you could consult an expert.
The expert could direct your efforts and attention to what is most worthwhile. She could give you a foundation of knowledge and understanding so that you can easily build a fortress of knowledge and experience. She would let you make mistakes, and then point out through your own experience how to improve.
Do this. Don't do that.
She will teach you how to connect the dots, draw out the implications. When you are focused on the what and how, she slips in the why. When your focus is narrow, she gives you the big picture. When doubt and uncertainty creep in, she makes the unreasonable seem reasonable.
You still need to put in the time, discipline and effort. You still need to make mistakes, go back and learn, reflect and contemplate. But you don't need to do it all by yourself.
Find yourself a good mentor. Ask questions. Listen. And do the work.
The best experts start out as amateurs.