I'm not going to touch that one since this is not the bowhunting forum. Someone else can give there take on it though

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And you don't need a peep sight and kisser button, one or the other will work. They basically serve the same purpose. You also need to install the peep sight correctly, which will require that you have proper form first.
You need to learn how to draw and hold the bow first, then make sure it fits you. After that you can set the peep sight height and everything else.
Paul