Advice, please

[rickfriedmann]

I'm still fairly new at this and I have two questions I'd like the forum's advice on.
First, when I'm in A what fly balls do I REALLY go out on? (I know the mechanic is the curving ball toward the line and the circus-catch. But in real life which ones do I really want to go out on?) Same, in B and C - do I want to go out to the close flies in center or rely on PU who in pre-game said he'd cover those.
Second, on the ball beat into the dirt if BR is inside the baseline do I ring him up if the catcher or pitcher has to throw over him and it gets past the first baseman, or do I make the fielder actually have to hit BR to get the baseline call?
THANKS!