There's nothing like being surrounded by the experience, creativity, input, and inspiration of other artists to propel you forward. Don't discredit yourself! Your bulino is terrific! You have a nice, delicate touch, and an eye for subtlety and detail. Any improvements in my opinion are...
By the way there is no real right or wrong, but by asking yourself the right questions about how you see and feel about what you have done, i.e., did you accomplish your objective, only then will you discover, figure out, what you know needs to be done to reach the level of satisfaction that...
RRUP this is where artistic license kicks in. You make aesthetic decisions to improve the flow, communication with the viewer, etc., trust your intuitive judgment! Photorealism isn't always good! Don't be limited by your reference photo, etc. What looks good to you? This is where it becomes...
Habib I'm taking a chasing/repousee class and just starting to appreciate the tremendous amount of back (repousee), and forth, front (chasing) work and time involved to create the work you produce at such a high level! Hats off to you for your artistry, and tenacity in the face of adversity...