Man I haven't done one of these in a loooooong time!
Aaanyway
These are the things that I find were you struggle in.
First off you have a very good start! The head looks a lot like a cat (so good job on that!), however the body looks a lot like a dogs.
It's really squeezed and a cats body is really long. It also has a lot of curves and cats body I more straight then not.
Pointers
Cats legs are skinnier then dogs and they have smaller paws as well.
Although they have fur they aren't as show off as dogs and their fur would fit their body like they almost have none (the exception is long furred cats).
They have whiskers.
I hope this helps!
Also I know people say this but references is the best teacher. Look and look and look.
And if I have said anything wrong please dont hesitant to tell me!!