Hi Chris. I'm not the best person to answer either, but I agree with @stringfellowart.
Here is what I see as your strengths: Your characters and storytelling are appealing. Overall, your color choices are great too, but I think there's a bit room for improvement there. Here's what I think could be improved most: rendering execution.
In my opinion, these are the strongest in terms of rendering. The sketchy texture over the more digital looking coloring works well. I also like the texture you have going in the football and grass, and I think it might be worth exploring using more of this throughout your work.
This next one I feel is weaker in terms of rendering. There is a mushy digital quality to it. I think if you brought in more of that sketchy texture and lines over top, it would strengthen the appeal of this piece and some of the others that have the same quality to it.
This next piece looks blurry on the upper half to me. I almost looks like you had a duplicate layer on top of the other, and offset one of them.
I think if you could go through your current portfolio and unify the rendering a bit, that it would really bump up the professional feel.