The fun of compositing in Photoshop can help you learn all about the tools. Doing composites helps you learn how to use them and gives you more experience within Photoshop.
I have posted some of my composites with explanations of the work along with the stock photos used.
There are also some image retouches and repairs included on the page. Image retouching is time consuming but what better way to learn then to practice when you are able.
Here is the page on this site: https://thecreativetablet.com/photoshop-compositing-more/
Please let me know what you think of the images. Critiques are as always welcomed. How else can you get better at what you do?
The Creative Tablet