Drawing is really something that kills your time and tge only thing after you have put some effort to it ...you come to know how good the time spend was .it kind of hypnotizes you , until you dont complete the drawing it wont let you anything ..... At that moment you keep adding the detail until you feel satisfied about what you have created...
This is looking good...
First let me introduce myself i am also in drawing things out ...a bit more into sketching...
I can see the effort or the thing when a person tries to make up something stuck in his head ....bringing it to shape it is really an art ....
I am suggesting ...i know i am not that great in it but suggestion is always better to get ...as you are into drawing i feel like i am helping myself..

I think if you wud have made it with the little shine ..i mean making it something reflective ...it wud have given it a different look ....more realistic type ....and about the boundary black lines it wud have been better with little rosy red... but overall it is good...