For pattern you can use your sweater.
And you cut it out of fabric.
On the front side you cut out for neck.
Then you cut out the sleeve.
And you sew them together.
Then you cut out the hood and sew the both parts together.
Now you cut out the strep and sew it on the hood.
Then you sew the both part of the sweater together and sew on the hood and the sleeve.
Now try on the sweater and measure them, then pin them as how long as you want them to be.
Then you sew the end of the sweater.
And now you have something like this.
So then we cut out pocket.
And two streps.
We sew them on the pocket.
And the pocket on the sweater.
Then we cut out the paw and sew it on the back of the sweater.
We are done:)