A valiant effort with MS Paint... or at least I think MS Paint.
The eye is okay. It looks like you grasped the concept that eyes aren't one color but have different shades. I dare you to mix in even more shades of blue. Heck, try grays, and hints of purples or greens. You'll be surprised on how much color there are in eyes.
But the iris seems to be cut short. It needs to be round. Also, try to make the outlines less "wavy". I know it's hard to make them nice. But it comes with practice.
Keep drawing. Masterpieces don't happen overnight.
PS: I feel so dumb! I just realized the eye is your signature.
