Ability to create a page like on notion which i can share then with whomever i want

To be able to create articles for example, or write something long and have it approved, or fe the document- which i sent to a client- he approves it, signs it - and i send the confirmation letter to his mail adress ( the email automation implementation as well). But i think starting with possibility like creating a page and having a possibility to edit it would be cool.