I started just going through the course in the order it was presented, while doing drills for the section I was on in between. Once I finished the course I would do a PT once a week until a few weeks before the test when I started doing them twice, also while doing drills in between. Honestly as long as you learn all of the material and are able to execute in one way or another, the order doesn't matter too much. However, I would do the course before doing any practice tests, besides maybe 1 to see where you stand before and after tackling the course.