There is a lot of information about PPG on the Internet. Sometimes it is controversial, confusing or misleading. Some people trying to sell their equipment and training and trashing every others. Also there is a lot of good and useful information. For beginner it is hard to separate right from wrong. I remember how it was confusing for me and how many mistakes (including expensive one) I made and one of them was – I chooses too heavy motor and advance wing for my student course.
So – I selected books and videos which you should, actually you have to watch before purchasing equipment or enrolling into the PPG course:
Weather website which I found useful for PPG pilots: WINDFINDER
Another website where you can see wind speed on different altitude VENTUSKY
Aeronautical Charts to check where we can fly: SkyVector