After you have learned good trigger control and are using an extremely consistent grip & shooting technique, then
you can start playing around with how much of the sights you need to see.
Until you have learned good trigger control, playing around with sight / no sight / partial sight pictures is just wasting good ammunition.
you have learned good trigger control at fast speeds, that's when the other stuff comes in.
Crawl, walk, run, run faster. You can bypass the crawl & walk stages and even travel really fast by jumping off a cliff and flapping your arms a lot, but that probably won't get you where you want to go in the shape you want to be when you get there.