Self Portrait - Character Design Process

With some of my downtime, I'm trying to get better at using photoshop to finish out my drawings. I love sketching and drawing, but I'm not super comfortable with painting or layered flat design (yet). But it's starting to click, and I'm having lots of fun figuring it out!

Please, critique. I need true growth here, so whatever you see that I could be doing better, let me know!