63A7OC7XA5313 mesh nighthawk

What system did you actual buy?  A model number helps. 

Cascading routers isn't a recipe for a working network. It causes a double nat. 

What is Double NAT? | Answer | NETGEAR Support

how do you actually have your network laid out? 

> [...] I bought this hooked it all up [...]

   Swell.  What, exactly, did you "hook up" to what, exactly?  (Hint: If
a device has different types of ports, then "connected to device" is not
enough detail.)

> [...] and it says I can't connect to internet . [...]

   "it"?

> [...] Is this because my home router is still hooked up? [...]

   Has your (unspecified) "my home router" a maker and model number?
What, exactly, did you "hook up" to what, exactly?

   Has your (unspecified) "the nighthawk" a model number?  Look for
"Model" on the product label.

> [...] When I click on nighthawk [...]

   Does that mean that you're using some Nighthawk app?  I'd suggest
using a web browser, instead.

   You might start with an oft-neglected resource:

      https://en.wikipedia.org/wiki/RTFM

   Visit http://netgear.com/support , put in your (actual) model number,
and look for Documentation.  Get the User Manual (at least).  Read?