You could do a lot with 500 characters.
You could tell like 3 very mundane stories.
1. A pencil was on the desk. It rolled off. No one picked it up.
2. The ice cube tray needs refilled. I will refill it.
3. There is a lot of wind outside. It messed up the bangs of that lady.
Bonus story.
I am in my bed. I need to get groceries but I don't feel like it. Oh well. I must go.