iOS Settings
Use the Focus mode available on iPhones. You can set up different modes for studying, sleep, etc. It functions as an 'Out of the Office' when people try to contact you.
How to set up a Focus on an iPhone
Customize your notifications so that you only get essential information
View and manage notifications
Limit your app use
Set up Screen Time
Make your display black and white
Slashgear.com - How to make your iPhone's screen black & white
Use iPhone Shortcuts and Automations
Shortcuts User Guide
Personal Automations using Shortcuts
