How to learn Affinity Photo more comprehensively

[RQuint]

I just purchased Affinity Photo for Mac OS. I have watched several tutorials from Serif on Vimeo. However, the tutorials move too fast. I have 2 screens with the app opened on 1 screen and the tutorial playing on the other. It still moves too fast. Is there another way to learn this app properly? I would like to understand basic concepts like contrast, vibrance, saturation, etc. I also am unable to understand about the brushes concept. I want to start with these basic concepts and move up to how these concepts are used and applied. 

 

Edited March 26, 2019 by RQuint
further instruction

[R C-R]

You can pause the videos or move the timeline marker back to replay the same section repeatedly. I suggest starting with the Beginners Series, Introduction, & Basics sections listed here.

The built in help is also a good way to learn the basics of the UI, tools, etc. I suggest starting with the topics in the Introduction & Get Started sections, & then go to the Workspace section & working through the first 7 topics. 

[v_kyr]

Further there are books about the software, which show how to use the software. Serif itself offers a workbook for Affinity Photo (actually with a 20% discount), some other third party sources (book publishers) are also offering books.