Yes, I do mean a place to start. Or a good program to use. I have been wanting to write a couple of novels and I am a visual learner so i need to “bring characters to life” so I can see them to describe them better
May, as an avid painter myself I can attest that there's absolutely no doubt that Ps is the best software for these types of renderings but it's not the only one. If I did not have access to Ps I would go with Paint Tool SAI and then Krita.
However, let me clearly state this................if you are not an artist who has experience painting with real paintbrushes, then none of these programs are going to help. You have to have the underlying skill in order to paint with any digital instrument. If you can't draw and paint a character like your example with a analog pencil, brush and paint/medium.....................Ps will not serve as a magic tool to allow you to be able to paint if you don't already have artistic talent. Your will be wasting time, effort, and resources.