Google photos does facial recognition But re-exporting from google photos is hell.
1 if you ever export the entirety of your google photos it wont be sorted by facial recognition at all
2 google photos strips everything of its meta data and stores it in seperate files. So of you ever export it all and wamt to check settings or date or anything you cant.
Wouldnt recommend google photos
Shoot at the lowest iso possible to get a good image.
You might have an f2.8 lens but for depth of field purposes youre shootimg at f4. But its getting dark out. Lucky for you you have a modern camera so when you move up a couple stops of iso you maintain your other settings and get an image that comes out just fine.
I dont touch iso until i need to. I shoot moving subjects so setting the shutter speed is my priority. However i can only go so slow on shutter speed before i cant track the subject well enough. Lucky for me auto iso will take me up a bit and come out with a good image.
Dont just randomly set 1/1000 shutter f22 iso:auto but its not the end of the world if iso is above 100. If your other settijgs are maxed out either physically or by the restrictrions needed to still get a good photo dont be afraid to let iso do its thing