Dashboard application functions for admin

Need help Database
1

Im trying to create a dashboard (Admin only) how can I access dashboard access and how can I create a scalable DB?
The dashboard houses 2 user types- Wait list Customers & Business applications
All of the applications are sent to the dashboard through a repeating group.

Dashboard functions:

  1. Accept & decline different beta applications & declined businesses get sorted into a separate group (how to turn into Pending,Approved & Declined tab)
    2.Create a multiple lists of selected businesses & Export lists (Best method)
    2.Search through applications by 4 Data types or specific name
  2. Export the list of CUSTOMERS waiting on wait list
    4.Export different list of groups for

Thank you so much already for the help, I just hope this gives you more insight!