A) This site has a tutorial section with next gen art asset stuff.
B) You have access to the entire god damn internet. Is it really that hard to google around for some tutorials?
C) You're asking Modacity a question specifically aimed at modding Cryengine 2... How many Crysis maps have been premiered on this site again? How many times have they been seriously downloaded?
D) Listen to Mech
E) Listen to Disaster
F) Listen to Inferno
G) Learn the editor before you try to make a map. I don't mean just the how; I'm referring to the why as well.
H) Make something simple like a basic forest/beach combat map. Something small, something easy to make and easy to test. Learn how to do different things. Maybe throw some models into it. Release it and get some feedback. Build off of that experience. Basically, learn to walk before you try to run a marathon.

Most of all, calm down and actually listen to what people are saying. If Mech says it sucks, it sucks. He told you a bit about why it sucked. Address that.