1: Cats tails connect to their bodies in a very gentle manner. They curve downwards as shown above.
2: Cats have an arch to their backs that go up at the hips.
3: The legs have a sharp point to it and are slightly slanted.
4: Cat's bellies aren't flat. They have an arch to it. Be careful to not go over board with it or else it will look really skinny and take into account the cat's fur length too.
5: Cat paws only show 2 toes at the side angle and are arched.
6: Cats have a distinctive short and almost pushed in kind of nose/mouth.
7. Cats necks not really arch all that much especially in the position you drew your cat. Like the tail it moves downward slowly but with an almost sharp slant.
8. The neck and chest fur goes in then down and out instead of just going straight down and into the leg.
If you need any additional help just tell me! I'll be happy to help
