steel-gravelpit-cp-ctf

I Am new, have no clue about how to make a map, but there is something I want to suggest.

Is there a way that I could make a map that combines the concept of steel (the fact that capping affects the map) and the look and feel of gravelpit (buildings and tullels, you just kinda get the feel) and make a symetric map likke that that would be either

A standard cp map but with moveable map like steel

B as above, but capping doesn't win, there is intel, capping just changes enviroment, nothing more. the goal is ctf

so far my only idea for layout (THIS IS EXTREMELY OPEN TO SUGGEXSTIONS)
is like 2 gravel pits facing each other, with the spawn and a and b on each side, and c is the center point, and there is a side path from red A to BLU A, and RED B to BLU B , with a for type thing in the center of each path , and a one way exit from the sides to the middle point.

Ill open up gimp and draw it later.

so is this a good idea? how do u even make a  map?

any suggestions?

well, i hope you guys comment.