How do I add shading?
I know this is probably easy for many but as a newbie, I do not even know what to search under to find the answer. I find adding shading in Illustrator very easy but at am at a complete and utter loss to figure out how to do this in Photoshop. i've spent about 4 hours trying to figure this out. Below is what I did in illustrator....but how in photoshop? A youtube would be helpful, explanation, whatever. How can it be so difficult?

