My name is not Array Seven (It's Zephyr Fox!), and I plan on making maps in whatever spare time I have, as UEAKCrash has made me have a desire to do so. Thank you for having me!
Koth is definately the easiest to make since you really only need to construct half a map (assuming you're making them symmetrical). My original super pro tip would be to grab a paper and pen, and sketch out a layout for something. And remember, design > detail!