I have a question regarding wordpress navigation

I have multisite and am setting up the main site – which is basically just for signing people up and redirecting them to other sites I will be building.

I want to set up the horizontal navigation menu buttons to redirect the user or visitor to the other sites. So, if I have a menu bar with buttons that say Resource, Marketplace etc,

when clicked they would go to a page on another site.

Is this possible, and how would I do it? Thanks in advance! Linda