To help limit distractions while you use an app, you can use Guided Access. With Guided Access on, you will be limited to a single app, and you can disable buttons and set a time limit for your session.

To learn more about this topic, visit the following articles:
Use Guided Access with iPhone, iPad, and iPod touch: https://apple.co/3FGY5tP
About the Accessibility Shortcut for iPhone, iPad, and iPod touch: https://apple.co/38vtdQB

Additional Resources:

Get Support for iPad: http://apple.co/iPad

To subscribe to this channel: https://www.youtube.com/c/AppleSupport

To download the Apple Support app: http://apple.co/2hFtzIv

Apple Support on Twitter: https://twitter.com/AppleSupport

Apple Support Community: https://apple.co/38qiXsp

For more videos, go to Youtube Apple Channel