Ever since I subscribed on the annual plan back on July 25, 2016 there has been a great learning curve with this powerful program. Some very helpful Lynda.com tutorials I watched were the following:
Photoshop CC 2019 Essential Training: The Basics
Author: Julieanne Kost
Learning Photoshop Portrait Retouching
Author: Chris Orwig
The main go three tools that I use in all of my photos are the following:
Spot Healing Brush
Remove those small distractions with this amazing tool. Blend pixels from sampled areas. It’s a quick fix and very powerful.
Link here to Adobe explanation and steps
Curves Panel
Brighten, darken and add contrast to your image manually or with preset adjustments.
Link here to Adobe explanation and steps
Clone Stamp
This tool is very powerful when you need to replicate a part of the detail from one area of an image to the other. You can use a small or very large brush. That way it’s very versatile.
Link here to Adobe explanation and steps