You know light and the produce flame cantrips. Charisma is your spellcasting ability for these spells. In addition when you cast a spell that produces light, the radius of bright light is unimpaired by obscuring affects such as darkness and fog cloud as long as the light remains. If the source of light is ever removed while cleansing an obscuring affect the area would fill in with the obscuring affect.

Also since you are a being made of light, you are resistant to Radiant damage.

You can telepathically speak to any creature you see provided the creature is within a number of feet of you equal to 10 times your level. You don't need to share a language with the creature for it to understand your telepathy, but it must be able to understand at least one language. This process of communication is slow and limited, allowing you to transmit and receive only simple ideas and straightforward concepts

When the Children of Light speak like a heavenly song and the meaning is often recieved through telepathy. You can read, speak, and write Celestial.

As a bonus action, you can channel your energy to cause a stream of energy to swirl around you letting you ascend 20ft into the air and begin a glide. (You drop 5ft at the start of each turn and move 20ft during each of your turns until you end the glide by landing or falling.) If your glide would ever be interrupted and you are unable to move 20ft or your movement speed is reduced to 0 before your turn then you fall. You can do this a number of times equal to 1 + your Constitution modifier. You regain use of this ability after a short or long rest.

You are small, between 2.5 feet to 4ft tall.