Which smartphone Apple should I choose?

Every product has its nuances, and if you have not used an Apple device before, it will seem different. Have you ever used a smartphone in the past? You can use this link to get to understand the Apple iPhone, it is a User Guide. iPhone User Guide - Apple Support

If you are somewhere near an Apple retail store, you can always stop in and put your hands on a device and get additional help from store staff. It would take too much space here to try to explain the iPhone. You can also read reviews of devices on the internet.

You can use this link to compare the different models on sale at this time and make an informed decision, iPhone - Compare Models - Apple