Here's some practice on my drapery a swell as value's, threw in a quick color layer just for show.
Not happy with the drapery some fold don't make any sense, will do photo study later.
Ok, at first sight the painting blew my mind lol. But only thing that looked weird is his left arm, which is on the right. It looked unproportional and stuff. But the whole painting is very nice, keep it up!
And on the second note, drapery was sometimes on spot, sometimes not, but it's still eye pleasing. With a bit more practice you should get even better at this!