Explain to me LinkedList class with Node Class like you would to a 5 year old

Im currently taking data structures and algorithms class and turns out it is heavily geared on the concepts of linked lists. Unfortunately my professor is not the best at explaining codes. I have googled a lot of sites trying to understand how to construct a linkedlist and to be able to call it in main but for some reason its just not sticking. that being said I have the following code, am i doing it wrong? how do i insert a number into data and how do i move from one node to the next? and how do i call the node class in main and print out the data values? please explain to me like i am a 5 year old. I am using C++ codeblocks. thank you

#include <iostream>

using namespace std;

class LinkedList
{

    class Node
    public:
    {
        Node (int data, Node *n);
        int data;
        Node *next;
    };
        Node *head;
    };


int main()
{

    LinkedList::Node NodeObj;
    NodeObj.data = 5;
    cout <<NodeObj.data;
    return 0;
}