You could do worse than starting with the best VP training software, since it's only $55! Dan Paymar has been working on his OpVP software for many years, always attempting to improve it beyond what anyone else has ever dreamed of, and his version 3.1 (new released) reflects his vast knowledge of the subject. An engineer with a project, he is always fiddling with it to keep it the best. My understanding is there will be frequent updates, as he improves OpVP, and I suspect updates will be free, or at least inexpensive.
If your goal is to move to the next achievement level with VP, realize that by doing it all by yourself it could take thousands of hours of thoughtful, insightful study to advance significantly. Or you could spring for the $55, as I did recently, and you will become a master of VP, and quickly.
OpVP lets you tackle any pay schedule for any game, even games that haven't been proposed yet! For starters, you'll want to know the vast variety of games that are out there. Using vPFREE2 (free, actually, thru vpFREE) will lead you to most casinos throughout the country, and show you every VP game each has in inventory. You'll be amazed at the variety of pay schedules for some game; they can number a dozen or more. Dan's OpVP permits you to set up any one of these games with its exact pay schedule, and will prepare the optimum playing strategy for that game (which you can print out as your very own property). Then you can practice that precise strategy, and as you play the software teaches you to play accurately, according to that detailed strategy.
Well, at $55 it's truly cheap!