To be honest in PvE you will find you get by without having to chance stance at all through the levelling process. However in PvP, as I found, it can be quite different.
When doing my usual read up on the class I am/was about to level I copied all the weapon swapping / stance changing macro's and put them on my action bars but found that it was just causing more confusion.
Instead what I recommend is try keeping it basic and add the macro's as you find you need them, much less daunting and a better, more casual, learning curve.