You are doing great, Navigation templates are not easy! I have had a play with Template:Enhancing_e_learning_nav. I changed the title link to a shorter page name called study guide. You don't have to keep the name, I just thought it would be easier to demonstrate how to do it using a shorter name. I tried to show a couple of different ways to create the links for navigating between pages. One with the Unit # as the description and one with the subpage name as a description. Once you know which way you prefer, let me know and I can convert them for you if you want.