Ability for users to send emails or invite

Hello,

Does anyone have a detailed idea on how my users can send emails from their user page to their friends. I tried following someone on youtube, (this video https://youtu.be/gsflyQxAXlk) then I created a test user and tried emailing myself and nothing happened. I am on a paid subscription and i’ve turn on the Api/backend workflow. I’m not sure what went wrong. Any advice would be helpful.