Find an instructor who will tailor a nav class to you and your environment. The ones that are run by the book generally suck. Which is why I wrote my own that leaves the instructor lots of freedom and in fact requires them to do some work and augment the course with their own knowledge of the local conditions. It also allows and requires them to "up the ante' so to speak for those who think they have pretty good nav skills. Can do a square and triangle ok? Consistently? Cool. Here's a course with 5 course changes, leg three you need to use natural nav, leg five -uh oh- vis just went to hell so take the spool out and run the next leg with it and the compass. Oh and make sure you write down the heading you go out on and the distance in air pressure. You'll need that for your map that you'll turn in at the end of the class. Ya know, fun stuff like that.