This can vary by workplace but I would definitely make sure to check in with HR or whoever does payroll. You should never be shy about asking about first paychecks and pay schedules. Sometimes there are errors with onboarding folks to payroll and it's best to catch those as early as possible so you get paid.

In addition, depending where you are based there are some states where it is legally mandated to pay workers within a particular time frame (i.e. every two weeks at minimum). Employers can get in trouble and owe fees on that unpaid salary in those locations.