Through one thing know a thousand - Miyamoto Musashi
With learning and becoming an expert in many arts as your first task should be to become a master of learning.
Have your first topic the research and experimentation of training. Apply what you learn unto itself.
To have the grit to master the art of learning is to be your goal, first step, and habit. If random trivia and diverse amateur skill is your desire ask yourself if that's anything more than mental masturbation.
Fully master any one thing is greater tool than a thousand amateur insights.