Unfortunately there is no substitute for PETS. Here are the things I would reommend that a President-Elect do to become knowledgeable.
Read the three handouts that RI has, links below. These are excellent and will not take too long. The Rotary Club Heath Check you can go through with your club.
Larry Gardner the current Governor prepared an excellent leadership video, you should look at that.
The handouts given to the PEs are given here.