I've got a folding RRA front sight and an A.R.M.S. 40L flip-up rear sight backing up my TA31F ACOG. They both are very robust and perform well.
I don't exactly know what you mean by "learn to shoot right", but I know I have as much fun shooting the irons as I do the ACOG, and was amazed how accurate the irons can be. I can see the fixed sights if you're co-witnessing a red-dot or EOTech, but unless you're shooting irons only I wouldn't dismiss a quality folding rear sight.
I don't exactly know what you mean by "learn to shoot right", but I know I have as much fun shooting the irons as I do the ACOG, and was amazed how accurate the irons can be. I can see the fixed sights if you're co-witnessing a red-dot or EOTech, but unless you're shooting irons only I wouldn't dismiss a quality folding rear sight.