I need to convert an int parameter into a linked list field

I created a link list and an integer field to represent the linked list. Then I assigned the integer field to 0. I don't know how to convert the int parameter into the linked list.

template<typename T>
struct Node{
  T data;
  Node* next;
};

class Integer{
private:
  Node<int>* real_num;

public:
    
Integer(){
   real_num->data = 0;
   std::cout << "success!";
}

Integer(int int_convert){
   real_num->data = int_convert;
}