Play [Insanes]. They are the only mapsets which may require you to snap. [Hards] do not because they follow distance spacing rules and all you are doing is forcing a habit which is not needed there.
Your skill in osu!, and in general, stems from a few factors. I'll name 2:
1) Motivation
2) Your ability to adapt. i.e. Self-learning.
The best players are excellent at self-learning, and have very different playstyles. And they practice A LOT.
Whereas all the n00bs pretty much copy cookiezi's style to a detail and suck. (Or another fav player)