So the plan I set in motion is working smoothly! I simply erased the background from the drawn sketch, exported the picture as a .png, and then I imported it to Blender. It works!
I will be working on this set for the next few weeks. I will share more progress when I have more poses done. Since the background is pretty much complete, this project should go by much smoother than the last. The complete sequence will be ready March 20th.