I agree with David. My situation was very different. I had left an ortho group to start my own sports medicine clinic, so I technically didn't have any charts or patients. I didn't steal the charts from the old office. I just started new.
So from day one i used the whole thing. I didn't see a point to start half and half. If you are at all computer literate (not even computer savvy), you will do just fine with it. It is the little thingsy ou will have a lot of questions about and will have to play with and use. That is where the help will come in.
But you can't know what you need help on till you play with it and use it daily. That will help you.
I didn't feel like playing with dummy patients really helped me but I am very impatient so I didn't learn new things till I actually had a patient with a certain scenario.