You can get tutorials on the app by tapping the gear button in top-right of your screen and selecting one of the following options:
Install Keyboards & Tutorials
This option within the app, accessed by tapping the gear button on top right of your screen, will provide in-app on how to use your emojis along with your keyboard when messaging.
FAQs & Help
This section provides more of detailed instructions on how the app itself functions.
Get DogGoArt on the App Store here.