Others have already provided the majority of answers so I'll add something different. As someone who just made the jump after a decade of Android, be prepared to adjust your habits. Some things you do can transfer over from Android but others will not and the initial frustration and buyers remorse is very real.

I was ready to return the device after 2 days of use simply because of the adjustment period and how much things were annoying me, simply because I was trying to do them the Android way. You will most likely encounter things that always annoy you, there's just no way around it.