Yeah, I am self taught with the exception of watching all the youtube videos that I can of championship shooters giving tips. They've actually helped a lot in the last few years. I can barely afford my ammo, let alone paying for someone to help me, and at this point I really don't think I need the help.
You can learn a lot of good things from YOUTUBE, and bad things, too. You can also THINK you're doing something right, and practice it and practice it only to later find that it wasn't quite the proper way of doing things. Practicing the wrong things only makes you "wronger."
A number of us (4) in our local IDPA club had an instructor come in and run a class for us. He brought an assistant who was very knowledgeable. He spent about four hours with us. You'd be surprised just how much you can learn in such a short period of time, if the instructor is really good, focused on the students, and able to demonstrate what he's trying to teach you.
Several of the folks in that class went on to take a couple of half-day sessions with the instructor (a guy named Larry Brown), and the costs were quite reasonable ($100 - $150). That was some years ago, and prices may have gone up. He had access to good facilities. A couple of sessions, spread out over a month or two, would probably give you greater benefit than one of the big-name schools. (Most of the folks who go to the big schools are generally pretty proficient already, and are trying to refine skills.)
Larry was a top-ranked IPSC Grand Master (I think that's the proper term) and shot internationally, but has spent part of the past decade working as an instructor/trainer with Special Ops troop at Ft. Bragg. He still offers private instruction. (The thing I most liked about Larry was that his ego was never in the way -- and he was very careful about NOT damaging the egos of his students. That's a great "teacher" skill.) Larry joined us at our club for an IDPA qualifier match once; it was his FIRST IDPA match or qualifier, and he shot a NIB Glock 17 borrowed from a friend. He shot a very high MASTER score in Stock Service Pistol. It was like watching a time/motion study expert who was also a ballet star. Nothing sensational, except his scores, but absolutely NO MOTION wasted.
Instruction is available and often at very low prices. I'd recommend the one-on-one type of instruction if you can get it, as in some of the larger classes, you might never get the attention you need if you're missing the point on some simple techniques.