There's a bug in the get method. If we run this code:
MyLinkedList<Integer> list = new MyLinkedList<>();
list.add(1);
System.out.printf("%d %d%n", list.get(0), list.get(1));
the output is 1 1. I think you want to change
if(this.isEmpty() || index < 0 || index > this.nodeCount){
to
if (this.isEmpty() || index < 0 || index >= this.nodeCount) {
The following code will cause remove to throw a NullPointerException:
MyLinkedList<Integer> list = new MyLinkedList<>();
list.add(1);
list.add(2);
list.remove(1);