Need help with setting up navigation

Can anyone help me?

I’ve set this website up from scratch using wordpress. This is the first time I’ve done this and I’ve ran into an issue setting up the main navigation with wordpress.

I’ve got the menu showing up in the frontend of the site, but I don’t know how to style it correctly to work with my current menu setup.

Can anyone lead me in the right direction?

Thanks!

Here is the site: http://leatherlidinserts.ipower.com/sunstate/