Give it time. Spinning will get easier as you play more. If it bothers you that you can't spin well enough, then feel free to play spinner practice maps (either one you made or an existing one) and try to spin faster and smaller until the motion becomes natural, but there are very few maps out there (I can think of 2) where you need to be good at spinning unless you want to get into spinner wars 4modding [easy] diffs. A vast majority of players' spinning abilities keep up well enough with their playing ability to not be a problem as they progress.
Oh, one more bit of advice. I would say the most important thing related to spinners for you to learn is spinning reasonably close to the center. Spinning in huge circles makes it easy to lose your cursor, which may cause you to miss notes following a spinner. Again, it's something you'll get used to with time no matter what, but if you're looking to work on something, work on that.