It’s too hard to come up with a straight up answer, there’s too many variables. What I would say thought is it should be of no consequence how long it takes, if it takes a day it takes a day, if it takes one month it takes one month. I am a slow learner, I have to watch a course twice, once as a movie, just watching it and paying attention to everything, then a second time, only this time going hands on and practicing along so the knowledge solidifies in my mind. The important thing is that you are being productive with whatever time you can allocate to your learning.
