I am using my new iPhone and slowly getting used to it. I haven't done much ! A bit of looking on FB and taking a few photos. The playback of the photos is a bit disconcerting! Hey! That just moved! It's a bit unexpected to see things move at the beginning of what would be a still photo. I made a phone call this afternoon using it . It was a surprise! Just afternoon I rang the number and immediately heard the dialing tone. My old Whoarewe would take an age to switch on and then do the same just to tell me that there was no network! You can see why I just wanted to drop it into a bucket of water. It also used up the battery quickly and took hours to charge.
Do you mean live photo ? or slide show of a set of photos ?
You can turn off live photo on the top right hand-side of photo view finder when you take a pic.
Basic camera stuff is here
https://support.apple.com/en-us/HT205659
You can if it's live photo turn them back into a single photo.
Pic's you have taken the i icon photo app will show you all the info. You can also use it to ID stuff like plants.
Once you get use to it the photo app has al sorts of handy tools. iPhone has been my default camera for years.
Other photo stuff is here
https://support.apple.com/photos
sync photos to your iCloud account is handy way to view your library away from your phone.