The best comic book drawing teacher is your pen and pencil..

The best teacher of how to draw comic pages is the act of drawing comic book pages. 

Only by taking action and committing lines to paper will you learn how to draw comics. 

Practice is the best teacher of How To Draw Comics (of ANY sort)

Sitting around writing, reading, or studying comics in your head will only get you so far.

You need to take action....Eventually. Sooner or later.