If your just starting out, the best thing you can do is not listen to anything that anyone at the range tells you to do in regards to "what worked for them"; especially the guy who wants to run over and give you unsolicited advice. It sounds like you know where to find information about bullseye, the military and the NRA. Read it and stick to it, despite any of the temptations you will have to try something different. In your case, it's two hands and resting an elbow on your body. You may very well see some great improvement, but you will find that you never really "get good". Scores will usually stagnate and be very inconsistent, one night in the 30's the next in the 70's then the 40's etc. And when you try to go back to the fundamentals your score will be in the crapper. It's normal. It happens to everybody. But if you stick with the fundamentals, you will first see your scores stabilize, no more twenty or thirty point swings from day to day. Then you will see a steady increase, until you shoot better than your previous high every week. It takes time and practice, and very objective judgment of how well you perform the fundamentals. It's not easy and it's not fast.
With me it was trigger control, and I had very good shooters telling me what I was doing wrong, I just wouldn't listen. I got so consistent at jerking the trigger, I could actually get into the eighties fairly regularly. But every once in a while I'd get a couple of fliers up in the 8 ring, it wasn't that they were bad shots, they were my only "good" shots. I somehow managed to not jerk the trigger, and the shot went where the gun was actually pointed. I was so consistent at jerking the trigger, my sights were set high to the left, and when I jerked it, the shot went low right, so I'd pepper the 9 or even 10 ring.
Personally, I would dump the red dot, you'll be a better shooter in the long run if you teach yourself with a good set of adjustable sights. And stay away from the light triggers, it will only mask poor trigger control, which is arguably the most important part of bullseye. If you get good with iron sights and a 4 pound trigger, you will be able to shoot anything well.
Good luck! And don't get discouraged.