Head Umpire Newbie...suggestions appreciated

[head_umpire]

I admit it, I'm new to umpiring. Just last year September I took my first game as umpire and I was just promoted a few months ago to Head Umpire because of my knowledge of the game. But man, all these fine, diced rules. Fall ball starts up Aug 25 (and it is Fall) but I feel I have alot of reponsibility. The former HU (kind of a mentor) says it's easy. I'm expecting myself to do well, but when carrying 12 other guys? What's a good approach to take to this season? Should I be an instructor (and teach the umps) or just a coordinator?

One more question, I've figured out some of the abbreviations y'all use. If someone could list them though I'd appreciate it cause Im sure there's alot to use.

U1 - umpire1 (and such)
r1 - runner1
but what about f1? I seen that one used and was dumbfounded. Thanks so much in advance.