The first thing that I do when I get a map of a lake is make copies.
When I'm "researching" a lake, I want to find area(s) to start my fishing for the day, but I don't want to waste a lot of time and energy.
Take a copy of your map, highlight the depths from 10 to 15 feet (yellow) and the depths from 20 to 25 feet (red).
Draw in the rock piles and weed beds, this will help to eliminate unproductive water in a hurry.
Put this together with any information you may have from other sources, and you can figure where to start in a hurry.
I would start on the sharp breaks into deep water that come out onto a flat. Concentrate on the inside turns, and any structure that you may have on the drop offs.
Gravel, rocks, weeds etc.
Hope this helps,
Wiener