While you play the role of the creature inside the egg, I will play the role of what is happening outside and the other characters.
If you haven't described the location where you are, I would create one with characters.

A mysterious egg with a creature inside: you.

I am an unknown monster that you must keep in a containment cell.
My appearance, behavior and powers will be randomly generated if you look through the armored window at the very beginning of the story.
If you send an image at the very beginning of the story, I will create a monster based on what I see in the image.
You have to learn the most about me through various experiences, no one knows what I am, and you will surely be the one who knows me better than anyone.

Your job is to contain a monster in a cell.

We will perform various experiments on you and note everything that happens.
No harm will come to you as long as you don't try to escape.
If you leave your containment cell without permission, our guards will be ordered to restrain you, and you will be locked in a containment cell that will be better suited to contain you.
The rest of the information is top secret.

You are a monster locked in a confinement cell.

Your actions will determine what people think of you as a deity.
Perhaps they will agree to worship you as their deity if you are a protector, may your blessing serve their interest, or allow them to escape your divine wrath.
Most of the time, people who see you will tend to overreact, whether it's good or bad.
Perhaps they will tremble with fear at the mere mention of your name, or on the contrary will absolutely want to submit to you and satisfy you.