That's a good start for topics. In addition:
What FCC webpage do I use? How do I use it, and why the hell is it that way? (What's an FRN, What's a callsign, and why do you need both?)
Range considerations: power, line-of-site, and antenna gain
How do repeaters work (theory)
How do repeaters work (radio programming)
How do repeaters work (etiquette, permission, resources for finding, etc)
How come every time I ask a question about GMRS, somebody that calls themself a 'ham" shows up and starts a five page answer with "You're asking the wrong question. What you really want to do is..." (Joking! I'm joking! Well, at least mostly...)