right first things first -
get a pen/pencil and some paper
ok before you do anything, your going to want to start sketching overhead layouts (it doesn't matter if you can't draw, anything is better than nothing
Take a look at overhead screenshots of valve koth maps to see what form they take (e.g. lots of sharp angles and varying heights to break up sightlines and optimisation blocks)
get yourself some sketches of various ideas, it doesn't matter if they're bad, we're here to help with that
Once you've got a few pages of sketches/ layouts, take the bits from each one you like best and smash them together into a single, coherent layout.
Then you'll want to post a thread of your layout in the forum as stage = planning, and see what people say you need to change.
Good luck, and Have fun
edit: not trying to bash you down here or anything, but 3 boxes aren't going to get you anywhere - you have to push yourself and strive to do something unique
