wifi network name and password set up cm1000

> I purchased my modem/router today [...]

   A CM1000 is a modem, not a modem+router.

> [...] and can not find where to set up the network name and password.

   That'll be done on the router, which is not part of a (modem-only)
Netgear CMxxxx.  A Netgear Cxxxx is a modem+router.

> Model: CM1000|Ultra-High Speed Cable Modem-DOCSIS. 3.1 Ready

   As it says, "Modem".  A CMxxxx is used with a separate router (like,
for example, a Netgear Rxxxx).