You are improving, and with more practice will get even better. What I did with my first practice piece like yours was turn in 90 degrees, reload it on the frame, and quilt it again with a darker thread so I could see the new stitches. Have you seen any of the feather videos on you tube? There are a bunch that are really informative -
Click Here - for a good variety. You can compare what they say to what you have done and see where improvement can be made. When I started, just trying it on my own I found that I made a lot of 'potato chips' with feathers standing up instead of laying nicely. The videos really helped.