Making a map. What to do help. plz plz.

[noalias]

ive searched the forums and im just to dumb to understand. If some1 decided to make a brand new map what is the first thing to do. I just want a vague idea. What programs would you need. Is there any simple step by step tutorial.
Hope a kind soul will help.

[McFarlane]

I think you might post this in mapping idk.
Halo ce doesn't work for me so idk about hek.