This is quite good for a beginner, the only suggestion I have is that your metallics lack depth that the rest of the mini has. To fix this, try washing your golds with chestnut brown ink and your silvers with a black-blue ink mix. Once you've done the ink wash (dilute a bit for best results), go back over with gold or silver, and try to layer up a bit, for example with the gold, maybe layer up to chainmail on the highest points.