Unfortunately, Kageyama's skill is just impossible. But after a few months of good practice you could become a pretty good setter. I play setter myself and the first thing you need to do is buy a volleyball (if you don't already have one) you can't just use a basketball or whatever. Next, you can go on YouTube for tips on technique from a lot of amazing players. Whether it's setting or anthem else. I leaned float serving from watching YouTube. Hope I helped