I can NOT copy and paste on my emails in outlook where I get my emails

Are you trying to paste within an eMail in the Inbox?

If so try pasting in a Reply or Forward eMail, any change?

If MacOS...

Do a Get info on your Home folder, unlock the lock in the Get Info panel. Make sure it says you have Read & Write privileges.

Using the tiny gear icon, use the drop down to "Apply to enclosed items...