Hi MT2Leadership,
Welcome to the Apple Community, where some of us do our best to help each other.
Apple Support has an article online that may help you:
If you can't sign in to your iMessage account or FaceTime:
(Resetting NVRAM has worked for some.)
https://support.apple.com/en-au/HT202078
If you're on a network that's behind a firewall, you may need to enable certain ports.
https://support.apple.com/en-au/HT202078
If tips so far haven't helped:
If you changed your Apple ID or password lately:
Might be worth also checking out this article ...
What to do after you change your Apple ID or password
https://support.apple.com/en-us/HT204071
OR
Messages User Guide has a useful "Table of Contents" and search function:
https://support.apple.com/en-au/guide/messages/welcome/mac
For example:
Set-up messages on Mac
https://support.apple.com/en-au/guide/messages/ichte16154fb/mac
OR
There is a "Get Support" link to Apple at the top of this discussion, on the right.
Cheers :)