I have come across a you tube channel named "InAffinity" which covers free tutorials for affinity photo.
https://www.youtube.com/channel/UCOnLUmyPHr2rayOHVHWsHVw/videos
What makes this channel unique from others is that the information is provided at moderate pace with logical and scientific reason behind each step.
The moderator is to the point and explains every thing in easy to understand language.
I thought I should share it with everyone and hopefully you will enjoy learning from these tutorials.
If you also know about some thing similar, please share it in the forum.
Thanks