The character sheet are only there for you to use, Chomper. If you get confused, or can't remember something about a certain character, you can go through your character sheet and see what it was you decided from the beginning.
Second off, I would advice you to give some more infomation about the characters. You write specie, age, colour of skin, height and personality.
Now, I don't find that satisfying, as you might. I would go deeper with, gender, eyecolour, background story and maybe even the voice of the character. I would probably also go a bit deeper into the personality of the character. What you've written so far is a bit too thin I think.
You don't need to add all what I have said, but consider it. It might help you more than you think.
oh, and lastly, do outline the whole plot of the story to yourself, before you begin. Makes it easier to write a longterm story