/ic/ - Artwork/Critique

I've posted in other beginner threads but have never gotten a response. I'm having a really hard time beginning to paint any details and mostly being able to paint transitions between values smoothly. I'm feeling a complete block and have no clue where to go, but know it looks awful. Please forgive me if I misuse the term, but I think it's rendering? Going beyond the point where the basic colors, shadows, and forms are already. Is there anywhere I can learn how to do this? I do not want things to look cel-shaded, but I absolutely cannot figure out how to flesh out anything beyond that.

Picture shown is pretty much an example of what feels like a failure. I tried to add some transition between some of the areas of different values and it really just looks awful and messy. I'm sorry you had to see this