It depends solely on your skills and abilities to learn. There are some people who can't learn at all, they're made to learn something but it's just for nothing, they anyway would never remember something. However, there are those ones who learn a lot and they remember a lot. They are able to perceive new information and absorb it like a sponge.
In this case, it may take couple of days to you to learn all the basic things in trading and start trading. In other cases, you will be learn a lot during particular period of time and you will not remember naything, you will make mistakes and you will retturn to learning again and again.