Creating a client/contact database

Hello everyone,
New to this forum, just wondering if I could find some help in my newest project.
(if I am in the wrong place for this please let me know)

I would like to create an all in one contact management system that allows the admin user to manage, update and edit all data related to contact, generate reports for contacts and collaborate in real time with other admin users.

I’d like to do this by Creating a series of linked pages in our WordPress website that allow the user to read/ write contact data contained in Google sheets databases.

I was wondering if anyone knew of good plugins or methods that will help with this.
I’m open to all suggestions.
Here is a link to a general sketch of what I am picturing for this system.
https://sketchboard.me/jAmDKzRFrYsa#/

Thank you
Joel Brooks
Room to Breathe, llc
https://www.stpeteconcierge.com