Backup

See this Apple support article—>Transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support

Now some unsolicited advice: Get in the habit of backing up the phone regularly to avoid losing data in the event of disaster (Lost, stolen, dropped in a toilet, thrown under a bus, etc). The easiest way is to go to Settings/[your name]/iCloud and turn on iCloud Backup. Then plug in the phone overnight, and it will automatically back up every night.

See instructions in: How to back up your iPhone, iPad, and iPod touch - Apple Support

Also see: Transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support

Follow the steps here: link->How to back up your iPhone, iPad, and iPod touch - Apple Support