The simple way to implement something similar to what you want is:
Create custom menu (Appearance > Menus) http://prntscr.com/kausqj with 3 links, last one should be created using the WC endpoints. Add the custom classes for the first one – hide-for-loggedin and for the next 2 items – hide-for-loggedout . Then add the following custom code in child theme style.css or in Custom CSS field of the parent theme.
