These are my first steps in pixel art. I need some advise about shading and lighting of my main characters. This is Fiona, she loves cats. I have idle and running animations for her but the main problem is that I don't get how to make her more detailed. I tried adding some wrinkles to her t-shirt but failed
And also I have lots of problems with her hair, I just can't understand how to make it look good.



And my second character is Fiona's best friend - cat Mr Phillis. I read that it is not a good practice to use black color in pixel art but how I can draw a black cat without using black color?


Thank you for your time!