The following are some useful sites for SharePoint documentation:
Official SharePoint documentation:
https://learn.microsoft.com/en-us/sharepoint/
SharePoint help and learning:
https://support.microsoft.com/en-us/sharepoint
Official MS Teams documentation:
https://learn.microsoft.com/en-us/microsoftteams/
MS Teams help and learning:
https://support.microsoft.com/en-us/teams
Power Automate documentation:
https://learn.microsoft.com/en-us/power-platform/
Power Automate help and support: