Once you receive your Mendi, inside the box you will find instruction card of how to set up Mendi and download the app.
After you download the app and create your account, inside the app you will find "Learn" section. There you will find series of onboarding videos to help you start with Mendi. They explain all information you might need.
For more information on use, please see articles on this page : About Mendi and It's use