Learn the basic then start making a simple DM GameMode. After doing that you will learn much more and that will get you on the right foot to begin making your gamemode of any genre.
Hey, when I first started people kept sending me guides like the one above, BUT I JUST COULDN'T FIGURE IT OUT.
Then some one named Giovanni on MSN Helped me and now i'm an average scripter ( still can't do anything like house systems, advanced faction systems ) But I know the basics, send me a message on MSN and I'll help you with questions.