[Not sure where the technical questions come in that keep this out of the Comp. forum, but I'll give it a few more posts before moving it.]
IDPA "ESP" division is where the 9mm 1911s play. They do just fine.
I don't know what features your particular 1911 might have come with, but there are NO "most have" modifications. Go shoot. Then you'll find out what tweaks might possibly help your times. (Most 1911s these days come with a beavertail safety, high-grip cut at the front strap, opened ejection port, and flared mag well. That and a bright f.o. front sight are all I can imagine you REALLY needing. Maybe ditch the full-length guide rod if yours came with that, but that's really pushing "necessity.")
Accuracy? Not really the question. Safety is the issue. You must be PERFECTLY proficient at working with a holster, moving with the gun, reloading, using cover, etc. all while being completely mindful of muzzle safety and trigger finger discipline. Most anyone can shoot well enough to put scoring hits on 99% of the targets you'll see in IDPA or USPSA. The real question of placing well is how quickly you can see your sights and make clean shots without letting bad habits creep into your grip and trigger control. But that all comes in time. Right now, get shooting!
I dont see how anybody is shooting ANY shooting competitions with ammo and ammo aupply shortages like they are. I am not a competition shooter but i was wondering how you guys will do it this year.
If you're not in the habit (and haven't been in the habit for a while now) of buying reloading components in fairly large quantities when you find deals, this might be a rough time to be getting into the shooting sports. I'm still shooting stocks of components I picked up before the recent unpleasantness, and have a fairly sizable group of shooting pals who keep their eyes open for stuff in stock and good prices, and we help keep each other in enough ammo to shoot matches.
If we were hitting up WalMart for three or four boxes of factory stuff the week before each match?
Well, we'd all be broke at the very least -- but we sure wouldn't be shooting much these days.