There are 3 possible approaches for this, in order from least hacks required, to the most:
1. We can add a menu directly to the content of the page using the Creative template. — Requires no child theme.
2. We can add the main menu to the Creative template. — Requires a child theme.
3. We can create a new menu just for this page and have it controllable under Appearance > Menus. — Requires a child theme.
Which option are you thinking?