Start by confirming that your admin or owner level authorisation allows you to change the SSO settings, as well as giving you access to your domain DNS and identity provider (like Google or Okta). Next, prove your domain ownership by adding a TXT record proving you placed the text in the correct location for verification, which is just a nerdy way of saying put this here and sit around like a good human. After verification is completed and linking your identity provider you will need complete testing to ensure users are not locked out from using the system and they will not blame you. Finally, make a decision about if SSO will be required for all users and will users be automatically added to SSO or if they will be added manually. From looking at everything written above it looks to be a complete nightmare, but really, it is almost all about clicking buttons and waiting (like when you download large files) until you receive confirmation.
