Hello. When I am using Instantiate, how do I control the angle and velocity of the object, thanks.
The orientation (not the angle, per se) is specified via the third argument, which is a quaternion.
There is no specifying the velocity, since velocity isn't a property that all game objects created via Instantiate() will have. That said, Instantiate() returns a reference to the newly instantiated object, which you can then use to modify the object's state (including the velocity of an attached rigid body component, if that's what you're wanting).