I think thats a great question. Actually the body of knowledge needed to make money in trading is small - it aint like brain surgery, being a pilot, or even an accountant.
The real learning is the learning about yourself , your fears, your greeds.
You can spend yrs in a no mans land of boom and busts to your account.
Eventually you come out the other side.
My advice is find a simple system, devoid of bells and whistles and then spend your time concentrating on the peak performance aspects that will keep you from straying from that system.
You dont need to know even a quarter of whats out there.