Quick question about assigning things in constructors

[Vandorin]

I am basically creating a shape, and have two classes, "Shape" and "Point" Now I am declaring a position in point, a simple

public class Point : Shape
    {
        //Instance Variables
        private double y;
        private double x;


        // Getters
        public double X
        {
            get { return x; }
            //set { x = value; }
        }
        

        public double Y
        {
            get { return y; }
            //set { y = value; }
        }

        // Methods
        public override void Move(double dx, double dy)
        {
            double a = X + dx;
            double b = Y + dy;
        }

        // Constructor
        public Point(double x0, double y0)
        {
            x0 = X;
            y0 = Y;
            Position = this.Position;
            
        }

And my code for shape so far is

 private Shape position;

        public Shape Position
        {
            get { return position; }
            set { position = value; }
        }

        public virtual void Move(double dx, double dy)
        {
            X = x + dx;
            Y = y + dy;
           
        
        }
        // Constructor
        public Shape(double x0, double y0)
        {
            
        }

        public Shape()
        {
        }

I'm really confused on the two constructors, I am supposed to create a new point object, and assign it to position, but I'm confused on how I would do that. I don't even have a general idea, can someone help me? Did I do the point code wrong somehow?

-Thanks!