I don't know if this is relevant to you, but here's something I think every artist who transitions from traditional to digital often needs to be told sooner than later: Stop being afraid of cheating. Unless you're tracing with explicit intent on copying someone else's work or doing something obviously nefarious, you need to stop being afraid of using the tools and luxuries afforded to you with the digital medium. This may seem obvious to some, but you'd be surprised at the number of artists I meet who could vastly improve their skills if they weren't dead set that they can't, among other things...
- Use the transform tool.
- Use extensive reference, and multiple simultaneous references at that.
- Touch up the picture in post.
- Sample colors from other pictures with a similar color scheme.
- Use 3D reference to better visualize an idea.
...because they're afraid it's cheating or dishonest. These are all either things traditional artists (particularly in the comic book industry) do all the time or
would do if they could. It's not cheating, it's using the tools at your disposal wisely. And trust me, if you don't have a grasp of anatomy, color theory, lighting, and technique, then your drawing isn't going to turn out good no matter how many of these "cheats" you apply, so you shouldn't be scared that it makes you a hack artist, either.
tl;dr, don't let traditionalists and purists dissuade you from making your life easier. Good art is a product of knowledge and skill cultivated overtime, not of miserably toiling away for days at something that could be easily be fixed in two seconds.