Garry's Mod: Using Nextbot?

Hello Facepunch.
Well, I heard about this new thing called nextbot that garry has made, and I was very intrigued.
Now, I want to begin scripting a new SNPC, specifically a zombie snpc for my gamemode.
Because I am using the default npc_zombie and I used npc_bullseyes on props for it to attack, and that never works because it only aims for the npc_bullseyes.
So, this may sound like a rookie question, but could someone assist me or give me a few tips on starting out with nextmod?
Thank you very much.