Forward_List Split function, confused with pointer

Question

I have just start C++ and learned about pointers and I need some hints.

The code is about splitting a forward list into two (*this and *other). I think I have gotten the finding mid point right but I am really confuse about the pointers at the end (causing errors). I think I might have pointed ptr to lists but I am not sure. Can someone please giving me some ideas.

template <typename T>
    class Forward_list
    {
    public:
        class Node
        {
        public:
            // A node will hold data of type T
            T data{};
            // next will point to the next node in the list
            // we initialise next to nullptr
            Node* next = nullptr;
    
            Node(){}
    
    
            Node(T input_data, Node* next_node= nullptr)
            {
                data = input_data;
                next = next_node;
            }
    
            // Destructor
            ~Node(){}
        };
    
        private:
            // private member variables for Forward_list
            unsigned size_ = 0;
            Node* head_ = nullptr;
    
    
        template <typename T>
        Forward_list<T> Forward_list<T>::split() {
            Node* other = nullptr;
            Node* tmp = this->head_;
            struct Node* current = this->head_;
            int length = this->size();
            int mid = (length-1) / 2;
            for(int i = 0; i < mid; i++) {
                tmp = tmp->next;
            }
            
            *other = current->next;
            current->next = nullptr;
        
            return *this;
        }

Not sure if this is enough to be understood. Thanks for the help.