Your walking speed is 10.5m (35ft), and you have a climbing speed equal to your walking speed. Your jumps count as double the normal distance.

You have Darkvision, therefore you can see in dim light within 60 feet as if it were bright light, and in darkness as if it were dim light.

You cannot discern color in darkness, only shades of gray.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

Carrying capacity:
240 lbs (108 kg)

Push, drag and lift capacity:
480 lbs (218 kg) 

 You know the Minor Illusion cantrip. When you reach 3rd Level, you learn and can cast Mirror Image once without requiring a spell slot. When you reach 5th Level, you learn and can cast Enlarge/Reduce once without requiring a spell slot. You must finish a long rest to cast the spells from this trait again. You can also cast these spells using spell slots of the appropriate level or by expending 2 Focus points.

Intelligence, Wisdom, or Charisma (choose one) is your spellcasting ability for these spells when you cast them with this trait.

As a bonus action, you can create a cloud underneath your feet.
This cloud cannot be used by any creature other than yourself, nor by objects not in your possession; other creatures attempting to step onto it will simply pass through it as if it were not solid.

You gain a flying speed of 30ft for 10 minutes.
You can use this feature a number of times equal to your proficiency bonus, and you regain all uses after a long rest.

You can grasp things with your tail. It has a reach of 5 feet and can lift a number of Kg equal to 2.5 times your Strength score.
You can use it to perform the following simple tasks: lift, drop, hold, push, or pull an object, open or close a door or container, or make an unarmed [attack.

Unarmed attack allows you to choose between inflict damage, grapple (grappled) or shove (prone) actions.

As a bonus action, you can attack with a quarterstaff, which gains an additional 5 feet of reach while you are using it with your tail, a number of times equal to your proficiency bonus, and you regain all uses after a long rest.
However, your tail cannot use other weapons or shields or do anything that requires manual precision, such as using tools or magic items, or performing the somatic components of a spell.