I watched artist and teacher Mike Creighton draw Zel K. during Sktchy’s free Saturday morning YouTube stream last week and decided to draw him myself. You can see the photo reference of Zel on Sktchy here.
Mike taught a great way to draw glasses at about 22 minutes in on the video.
First draw the rectangle into which they fit, getting the perspective and angles right, then just round off or embellish to match the shape of the glasses. What a game changer!