Adding pages and Navigation line

I am a newbie with WP site creation. I have a menu heading called “equipment”. This goes to the equipment page where I am selling the equipment. I have (naturally) run out of room on that page and I want to create a new page (or pages) to continue my equipment listings. Can you tell me how to create the new page and add navigation controls to it or is there a plug-in for that?

Thanks for your time…

Chuck