Turn photos & captions into respectable InDesign document

I have about 30 photos that I use as visual aids for a LEGO Engineering class. I want to turn them into a unified Adobe CS5 InDesign document so that I can easily print all of the visual aids in a single file. The final document will usually be printed to 11x17, but sometimes also to 8x11 or to a4. Your job is to create the InDesign document, make a simple cover, chapter separators and a place for captions and notes. Maybe some flair to make it all look more professional I tried to do it myself, but with disastrous results because I don't know what I'm doing (see attached) - but you can see what I'm trying to achieve.