Here's a little visualization of how I do a lot of my art!
I begin sketching around on paper with my black pencil for lines and blue pencil for fur markings.
Then I scan the page into my computer and digitize the lines.
And from there I can clean up the lines if I need to and then just paint bucket fill the colours I want!

I post most of the line art I draw in my scraps, for fun. You can check them out if you want!