I red (black) lined this for you c:
It's not the best. but I tried. Here are a few things to note:
•Smooth lines: When you are drawing on Oekaki, in the top box on the right there is a bar called Smoothing. Fill it up almost fully. It will make your lines smoother.
•Anatomy: Ok, so mine isn't the most realistic. I'm more of a cartoonist. To make your drawings more realistic, I suggest looking at pictures of cats. I have a cat, and I watch her a lot. (As I'm writing this, she is sleeping on the printer xD)
•Shapes: It's always helpful to think about the shapes of what you are drawing. If you wish, you can make a sketch. When you are sketching, instead of just drawing it right away, draw it by shapes. Make a circle instead of the head, for example. Then, connect it all, smooth things out, and erase the extra lines.
•Re-do: If you don't like how something turns out, do not hesitate to re-do it.
•Layers: This can take a little while to get the hang of. Check out this guide: http://www.chickensmoothie.com/Forum/viewtopic.php?t=794080

