Hello. First of all, welcome to BYOND.

A good place to start off coding is by reading this guide.
I read it up to Chapter 7 only, since the rest gets way too complicated XD.

After you've learned the basic(ATOM,verb's,proc's and var's), I would recommend you to look for "libraries" and "demos" (they can be found under RESOURCES, on the left menu of the website)

Some nice demos are:

• Shooting Demos: This is a good one. I would start off with these.
  These demos tell you about Movement,New and Del (creating and deleting), among another bunch of stuff
• Click-Move Demos: like this one, teach you about Click, and yet again, Movement.
• Icon Management: Excellent One! This, for example, gives you a little preview on how icons work on BYOND.
• Many Many Others...
  
  Well. I learned most of my coding by looking at other people's codes.
  Most of the times you find out what a proc or verb does by just looking at the code, and then looking at the result (in-game).
  
  If you need anything else, just send an e-mai lto [email protected]. I'll be glad to help you out.
  
  See you around!