Opinion on Creator APP Design and Customization

So I have created a Sites Form: site_name, site_address etc...

Next I Created a Site Stops Form: (Lookup Field: site_name) and SubForm to allow adding tour stops

I created a Check-in Form to allow the tour guide to check in. They specify the (Lookup: site_name) and date/time is automatically filled in with current date/time.

I created a form called Tour: where I have some fields that they must fill in like how_many_ppl and notes and few others....

Once they check in, I need to assign them Tour: tasks to complete the tour, which may have different stops for each site. How do I go about assigning them the stops in a particular order, where they complete one, and it tells them next stop, etc...