Hair stylist dopers....book-video recommendations.

I just sheared my 7 year son with our Wahl trimmer.

It went better than I hoped but it doesn’t have that designer or unique look to it that I had imagined.

Still, it was my first effort out as a barber.

I want to be able to do better in the future for both of my kids ( m&f) do you know of nice, basic books or videos for the average schlub?
Also, sorta related, can I use my same Wahl trimmers to shave our dog (lab)or would that be icky?