Coming from USPSA, you already know it's more about the "Indian" than the "arrow"... just knowing that, plus having youtube, can be enough to set you down the right path (and dry fire and building/breaking positions uses zero ammo and costs nothing).
Normally I'd say go get training right away, but drinking from a firehose isn't always the best way to learn, if you're an experienced shooter in another discipline, there's probably a lot of stuff you can learn on your own that will allow you to get much more out of some real training when the time comes down the road a little... just be reasonable about it, and don't wait to seek training until after you've developed some bad habits.
FWIW, to a certain degree equipment does matter more in this game more so than in USPSA: doesn't mean rich guy beats poor guy every time or only dudes with the most expensive rifles do well and you're screwed unless your scope costs more than your whole USPSA rig. It's more subtle and nuanced than that, things like: if you're shooting a gun that weighs 15lbs with 2.5lb trigger off sketchy barricades and can't spot your impacts/splash, competing against guys running 20lb+ rifles with 8oz triggers who can watch their trace the whole way in, yeah, that ain't going to go well... It's not really an arms race, you just don't want to go into a knife fight with a butter knife when the other guy is bringing a machete (like I said, subtle nuances hahaha)...
So, welcome, it's fun, and there's a bunch of new stuff to figure out. It is different though: can't just show up on-time to a match with a decent pistol, mags, and ammo, and run around like a madman and finish near the top like in USPSA... with rifles: there's like 10 things you can screw up before you've even gotten in the truck to head to the range hahaha...