Hi, a lot are complaining about Photoshop being used in the YouTube comments this includes me, could you instead of using Photoshop use Krita? https://krita.org/en/
It is a free and open source GNU GPL software dedicated for drawing that everyone following your tutorial will be able to get even on Linux. If you use it this will allow us to use the same tools as you, the same brushes and interface so we will be able to progress faster.
Krita is more powerful than Photoshop for drawing (and much more than Photoshop CS2 2005 that you are recommending us to get as a free alternative) because it is built by digital artists and not photographers and it has a powerful brush engine with more settings than Photoshop, several brush stabilizer, optimized interface and a right click brush marking menu. It has a resource manager with a collection of brushes directly available by default made by digital artists like David Revoy that is part of the team: https://youtu.be/GHRwnVMwTE4
We don't need to learn software that are popular (Photoshop is popular for drawing because Krita is sill unknown), we want to be good at drawing and because some like me are very bad at drawing using different tools makes it a bit more challenging to follow you (the strokes don't look like yours).
Same applies for the sculpting part, you can use Blender sculpt with Dyntopo and a red matcap (the red matcap is available out of the box in Blender) instead of ZBrush and asking everybody to get a trial version. The interface and real time area topology reconstruction with edge collapsing is more intuitive and efficient, it does the reconstruction locally while you sculpt and collapse the edges, it never crashes or generates holes like ZBrush DynaMesh does and the goal of the course is to make a sculpt in 3D not to master ZBrush. Using the same brushes as you would be better.
Demo of Blender sculpt with dyntopo + red matcap (available by default in Blender) + AO: https://youtu.be/vB7kPWjBgQI
And this is an advice for your future tutorials in general, if there is free software that can be as good or better like the two I have mentioned above please use them. We don't necessary want to land a job and we can adapt with tools AAA studios use later on.