iPhone 14 does not have a Home button, so if your iPhone does have a Home button, you have another model.
Try double-tap the screen with your 3 middle fingers. You may need to vary the speed and timing of the double tap to nail it.
I am a Senior Citizen.
I am as well, next birthday is 79....if I make it that far.
If you have bad luck with the double-tap above, the next step is a Forced Restart. Follow the instructions very carefully.
quickly press and release the volume up button,
then quickly press and release the volume down button,
and then hold the side button until the Apple logo appears.
When you hold the side button, the trick is to keep holding at least 15-20 seconds until the Apple logo appears in the center of the screen. You have to ignore the "slider" when it appears and keep holding the Side button. More info here if needed:
Force restart iPhone - Apple SupportApple SupportOfficial Apple Support › guide › iphone › ios