I wish I knew how to turn photos.
I take all my photos with my iPhone. Then email them to myself and save them on my computer for editing, primarily cropping and resizing.
The only way I've found to have photos "turn" out the way I want them, as far as orientation is concerned, is to view them on my phone and if not oriented correctly, I rotate them on the phone. If I don't do this, I cannot get them rotated so they remain rotated once posted. They look good on my computer, but once posted, often they do not display with the correct orientation on the web sites.
"Quality is like buying oats. If you want nice, clean, fresh oats, you must pay a fair price. However, if you can be satisfied with oats that have already been through the horse, that comes a bit cheaper."