How would I spawn particles above a player's head in a circular motion?

Say I want to spawn 10 particles above a player’s head, equally distributed in a circular pattern, almost depicting a crown.

I know how to spawn particles. I’m just not sure how to use Vector3d to do so.

I’m aware of how vectors work mathematically, so please don’t feel the need to explain. Thanks!

I’m not sure what you are asking for here. You know how to spawn particles, you know how vectors work.
All you have to do is get your players position, add 2 to the height of the vector you become (you get position at the feet of the player) and then you would have the center of your circle.
The rest would be creating 10 more vectors based on the center vector and then spawn particles on each and everyone of them.