Your form makes most normal gear completely alien to you. You cannot wear normal armor, and instead must purchase or craft it as if it were barding for a mount. Your claws are also not as strong or dexterous as normal humanoid hands, and you must grasp items between your front feet. You may only attune to one item that is held or worn on your hands at a time, and you may only hold one weapon or object at a time. You have disadvantage on attacks made with weapons that have the do not have the Light property. If you are holding a weapon with the Light property in your claws, you may take advantage of Two-Weapon Fighting along with your maw, though you may not add your ability modifier to the damage of that weapon.

Dragons have a natural affinity for gold and treasure. Whenever you make a Wisdom (Perception) or an Intelligence (Investigation) check related to searching for gold or treasure, you are considered proficient in that skill and add double your proficiency bonus to the check, instead of your normal proficiency bonus. You also have the flaw "Inherent Greed: whenever you see treasure, you have a compulsion to grab it and claim it"

You are born with a set of fledgling wings, which will develop over time. Until you are old enough to fly you can use as wings to slow your fall or allow you to glide. When you fall and aren’t incapacitated, you can subtract up to 60 feet from the fall when calculating falling damage, and you can move up to 2 feet horizontally for every 1 foot you descend. 

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 can’t 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.

As an action you shift into any humanoid race. You lose glide, elemental resistance, breath attack, bite and talon traits in this form. You are able to use clothes, armor and weapons that this race would be able to use. You do not gain any racial trait from this form. As a bonus action you can return to your true dragon form. You drop what you are holding, you destroy any bags, belt, clothes and armor you are wearing or carrying on you. If you have a bag on you the bag is destroyed unless it is fitted for both forms, if the bag is destroy the items inside fall to the ground.

Your Strength score increases by 1 and your Charisma score increases by 2

A dragon left unchecked can live for at least a millennium, as far as recorded history has found. A newborn dragon is barely been out of the shell for less than 100 years. A true dragon reaches maturity around 2,000 years old.

Dragon tend to extremes, making a conscious choice for one side or the other in the cosmic war between good and evil (represented by Bahamut and Tiamat, respectively). Most dragons are good, but those who side with Tiamat can be terrible villains.

Dragons are taller and heavier than humans,, standing well over 6 feet tall and averaging almost 400-800 pounds, your size is Medium.

Your base walking speed is 30 feet.

You have draconic ancestry. Choose one type of dragon from the Draconic Ancestry table. Your breath weapon and damage resistance are determined by the dragon type, as shown in the table.

Draconic Ancestry

You can use your action to exhale destructive energy. Your draconic ancestry determines the size, shape, and damage type of the exhalation. When you use your breath weapon, each creature in the area of the exhalation must make a saving throw, the type of which is determined by your draconic ancestry. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. After you use your breath weapon, you can’t use it again until you complete a short or long rest.

You have resistance to the damage type associated with your draconic ancestry.

You can speak, read, and write Common, Primordial, and Draconic. Draconic is thought to be one of the oldest languages and is often used in the study of magic. The language sounds harsh to most other creatures and includes numerous hard consonants and sibilants. Primordial is a guttural language, filled with harsh syllables and hard consonants.

Your fanged maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d4 + your Strength modifier.

Your talon paw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal slashing damage equal to 1d4 + your strength modifier, instead of the bludgeoning damage normal for an unarmed strike.