I'll chime into this one.... I got to teach photoshop classes at my local community college for several years. Mostly older folks and most of them only wanted to correct old photos.... (photoshop can do so much, but this was the most common request.)
Now you CAN learn this program on your own but it's much more difficult than when you have a teacher in the room who can hear someone's loud SIGH and go see where your stuck. But learning from books and tutorials does have problems.
It's how I learned, and before youtube too. But I had free access to ALL the books the college instructors had.
Now, just as an example of what hell you can go through.... had a book with a bunch of neat projects with step by step instructions.
Follow any of those exactly and you WILL learn stuff. Until the writer makes a mistake.
Case in point.... some long winded graphic thing.... I get to step 13.... "Now drop image." HUH? NO GLOSSARY in ANY BOOK had "drop image" in it. WTH???? It was about 6 weeks and countless books before I finally figured it out.
Very old versions of photoshop had what they called a "floating layer." That was done away with... oh, guessing here, version 5? Ish? Maybe sooner. "Drop image" went away with it.
All it means is deselect. So six weeks of struggle over some writer using the wrong term. A teacher could point to a key and say do this. click.
Anyway... in my classes, and again most of these folks barely knew how to turn the computer on, I'd start off going through basic where are menu's, what are layers, just how to get around. And in the class what I did on my computer was put up on a big screen so everyone could follow right alone. You learn best by doing it yourself right?
After all that, my very first real lesson was simply to take any stock black and white photo, and show people how to colorize it.
I'd start by showing them the hard way. Paint over it in a new layer, adjust each brush in size, fuzziness, opacity, make new layers for this that and the other.... this is just to get folks use to how to use and adjust tools.
THEN... ha. I'd show them the easy way. Paint opaque... then adjust the whole layer's opacity. Every single time I'd do that at least one person in class would say OOOOOHHHHH. (love it.)
After brush, erase, opasity and new layers are understood... THEN I'd start in with cropping tools.... We did silly college images.
(hahaha... one lady took a photo of her X husband and sat him on top of a saguaro cactus..)
Masking is a cool way to select stuff, and later the clone tool.
That one takes some practice to really master. Here are a few photos I'd use with the class.
Artmakers Worlds Photography Retouching service
At some point I'd give everyone a challenge photo but NOT give any instructions how to do it.
I had a black and white photo of a statue, hands holding an orb. Took a color photo of the earth, and said take out the orb and replace it with the earth. Let them all figure it out.
They all knew enough, but sometimes thinking through a problem is better than reading it in a book. Always fun that one.
Here... mind you this is VERY old now, but I started to put together tutorials on my site. Sadly the college put a stop to short courses like mine many years ago. I miss it. And stopped adding lessons. But if anything here helps you, have at it. As long as I already have it up, someone might get some use out of this.
Artmakers Worlds Photoshop tutorials