Create global event hendler to add no of child folder when create new product under website

Hello Experts,

I am on beginner level in Kentico, I am developing page application with Kentico CMS version 8.2. I need help to implement following logic: Explanation: I want to add specific no of folders as child page under the new product page type at the time of new product insert. Like:

/ (root)
 - Products (added page type cms.MenuItem)
    - ProductXYZ (added page type cms.product)
        - Folder_A
        - Folder_B
        - Folder_C
        - Folder_D

In above all the child folder under the ProductXYZ need to create automatically just after ProductXYZ insert. I have explored for this and got that need to create global event handler and register it. form this url: https://docs.kentico.com/display/K82/Handling+global+events

Above link explained how to create global event handler and register it:

private class CustomDocumentEventsAttribute : CMSLoaderAttribute {

    public override void Init()
    {
        // Assigns custom handlers to events
        DocumentEvents.Insert.After += Document_Insert_After;
        DocumentEvents.InsertLink.Before += Document_InsertLink_Before;
    }

    private void Document_Insert_After(object sender, DocumentEventArgs e)
    {
        // Add custom actions here
    }

With this I understood that I need to put code under the method Document_Insert_After, but I am new with Kentico and don't have experience with Kentico API and code.

Please help me what code should I write to get currently created product node and add new child folder under that. Example code will help me a lot.

Thanks in advance.