As a quadruped you have a unarmoued AC of 11 plus your DEX modifier 

As a cat you are unable to use any weapon, tools, or traditional armor. Armor costs twice as much because of your quadruped form and you are unable to wear any type of metal armor because of the weight. Any tool proficiency you have you may use to give someone the help action to give advantage on their roll because you do not have the hands to use complex tools

You are a Beast/Animal.

You are Small.

Your walking speed is 40 ft., and you have a climbing speed of 30 ft.

You can use your claws to make unarmed strikes. When you hit with them, the strike deals 1d6 + your Strength modifier slashing damage, instead of the bludgeoning damage normal for an unarmed strike.

You have proficiency in the Perception and Stealth skills.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.

Your reflexes and agility allow you to move with a burst of speed. When you move on your turn in combat, you can double your speed until the end of the turn. Once you use this trait, you can’t use it again until you move 0 feet on one of your turns.