To create a "polls" app in the "apps" sub-directory, do the following first to make the directory (assuming you are at the root of your django project):
Next, run startapp to create "polls" in under the "app" project directory.
startapp polls apps/polls
Install the app;
INSTALLED_APPS = [ 'apps.polls' ]
makemigrations polls migrate
urlpatterns = [ path('polls/',include('apps.polls.urls'), ]