Unable to Re-Establish SMB Shares from macOS to Infuse on Apple TV After Revoking Full Access; Seeking Restricted User Setup for External Drive

Hello, initially my Infuse was working fine.
I had managed to connect my hard drives connected to my macOS so they were visible on my Apple TV.

Then I realized that everyone had access to my entire computer and I immediately “forgot these shares”
THIS IS MY 1st problem

After that, it became impossible to re-establish them and I don’t understand why.
THIS IS MY 2nd problem

Following the advice from the Firecore FAQ, I created a new user and shared their access but it’s impossible to connect it to my Infuse. SMB no longer responds.

WHAT I’M TRYING TO DO - MAYBE IS THIS IMPOSSIBLE?

Create a “family for Apple TV” user that would only be linked and accessible to an external hard drive (Time Capsule) that contains movies.

Create another system to have access to my computer and its content but which obviously does not appear to those who connect to my Apple TV via the TV..
Is this possible?
How?
Possible to find a simple and detailed explanation step by step?
Possible to talk to a human by phone?
I’ve been unable to resolve all this for years.

Respectfully and thank you in advance for your attention