If im not mistaken, I think i spy the grass blade / fur brush shape :P I usually dont bother with it unless im looking to spend crazy time on a pic xD

You spy correctly. I modded it with brush editor to get a good fur texture, and saved it. Now with just a few swipes, I got the fur.

Practice practice! That's the ONLY way to improve!! I think this is an EXCELLENT first try! You did a great job, especially with adding those darker colors around the pupil. ;3 Here are some tips, I hope you don't mind I went over this image to show you what you can try next time!
http://i425.photobucket.com/albums/.....otarcs_eye.jpg

Sorry if it's cluttered lmfao I tried to fit in as much advice as possible!
http://i425.photobucket.com/albums/.....otarcs_eye.jpg

And here are some tutorials that are great:
http://www.youtube.com/watch?v=IoMuR-1E4S0
http://www.furaffinity.net/view/9787322/

omfg thank you sooooo much! This helps a lot :o

Anytime, keep at it! :3 Would love to see any other attempts you make at drawing eyes. I'd practice by following a reference first then trying it on your own.
And on my GODDD last night I had found like a TON of links to different eyes to show you the textural difference in Irises...WTF WHERE DID THEY GO?!? Whatever I shall post them here! Notice the difference in animal eyes and human eyes. Take notice of the highlight variation depending on light source as well as the pupil color - it isn't always a deep black!

Human eyes! Check out the 'shredded' stringy texture of the iris and subtle shadows:
http://upload.wikimedia.org/wikiped.....5/Eye_iris.jpg
http://blog.urbansoul.in/wp-content.....13/01/iris.jpg
http://upload.wikimedia.org/wikiped....._Human_Eye.jpg

Dog eyes:
http://fc05.deviantart.net/fs71/f/2.....me-d3l8wub.jpg
http://texx-wolf-tails.webs.com/dog-eye-6.jpg
http://thumbs.dreamstime.com/thumbl.....8444f0ZCKD.jpg
http://www.caninest.com/images/dog-eye-4.jpg

Cat eyes:
http://1.bp.blogspot.com/-n0JfDMZ_T.....0/F071721a.jpg
http://stuffpoint.com/cats/image/39.....s-cats-eye.jpg
http://wide-wallpapers.net/download.....-2560x1600.jpg

Bird eyes:
http://2.bp.blogspot.com/--VoUy0Lbk...../Hawk_eye.jpeg
http://farm7.staticflickr.com/6013/.....a8dc7dd1_z.jpg (looks like dichro glass! cool!)
http://fc08.deviantart.net/fs70/i/2.....slaextreme.jpg
http://farm1.static.flickr.com/31/4.....23c71dc2e4.jpg

Ok I hope this finally works.. and helps!

:o that second tutorial really helped alongside with yours :O TYSVM!
http://www.furaffinity.net/view/9904293/