Oh Dot, you always take the words right out of my mouth, haha.
Amicat: as Anon said, this is a place for growth and improvement. Crit is given in the hopes it will help you improve, so I hope you take it on board and not see us as arsehats.
Both Dot's and Anon's advice were solid, and leave me with little to comment on without repeating what they've already said. I can, however, give you some pointers in colour use:
This piece is currently lacking in contrast/any visual "pop", leaving Medic quite washed out.
Even in a soft pastel piece there should be use of contrasting colours to catch the eye. Grey is usually used to enhance the vibrancy of other colours - in this case, it's making the blue of the background stand out.. but Medic should be the focus, not the blue background wash! Next time, you could try using grey for the whole piece, and add selective colour to highlight something you want to bring attention to (bloodied hands or equipment, for example).
I sincerely hope you take our advice on board and keep drawing with these notes in mind. You've got potential, and I'd like to see you keep improving.