I'm new to Godot coming fresh from unity and I cant figure out how to duplicate an object/node. I've tried the duplicate function to no effect. My most recent attempts try to create child nodes with the same property as the parent. I cant seem to get anywhere, help would be appreciated. Here is my code that tries to create a child node:

Node copynode = new Node();

// Called when the node enters the scene tree for the first time.
public override void _Ready()
{
    copynode = this;
    for (int i = 0; i < 5; i++)
    {
        AddChild(copynode);         
    }

}

Also could someone tell me what the object/node/item in the scene is actually called and how to reference it? Is it a Node or a Gamedot.Object or something else? And how do I get and set its properties? I'm just really used to unity and cant figure this stuff out. The only tutorials I find are in the Godot language, and I kind of know c# already so I would prefer to program in that.