For a first photoshop image I am quite impressed, it is much better than I can do. Some things to consider on the next image you try...
1. Make image 1600x1200 resolution
2. Add either more colors or more shades.
3. Try adding in something of your own, lots of swirls and circles have been done before, be unique and you will be rewarded (in your c-index points)
Overall, not bad for a first try, I'm sure in due time you will be turning out phenominal images. Keep up the good work.