Step 6: Cut outline of sides
The snake that I have pictured doesn't match the pattern in step 2. Here I am cutting a snake with a wider head than body so I had to make a VERY long cut down the sides of the body. My cut ended up a little uneven and required some extra work to smooth it out later.
RECOMMENDATION: Keep with the simple pattern for your first puzzle. After you have completed a puzzle, then go a little fancier.