The trick with spray paint is to hang the object you are painting.
So you can cover/hit all sides evenly/at once.
If you are using a rattle can shake it often to break up any large paint blobs.
When you spray angle the can back slightly so only the lightest/finest particles of paint hit the object.
Before the paint runs it starts to look really shinny on the surface, if you see that STOP.
Take a break to let it dry and come back to it again later.