You are racing against the clock??? Slow down, and concentrate on one figure.
Now for the eye's this is how i do it, and it is not te law to do it this way!!!!!!!!!!!!!!!!!!!!
First: You have to mix your skintone with the white for the eyeball. Then it looks more natural.
Second. The white of the eye is less then 50 % of the totall of the eyeball, so your next step is a black dot in the eyes that is more then 50 % off the total.
Third: Avoid that the black dot's are in the middle. Let them look aside but not crosseyed.
Fourt: After the black is dry, put a color dot in the black, maybe a blue, green or some lifelike eyecolor.
Fift: When that is dry, i repaint the uppereyelid with burnt umber and the lower eyelid with burnt sienna. A kind of offlining the whiteeyball.
Tip: i paint the black and blue of the eye with a needle....
O, everything is painted with oilpaint....
I hope you can do something with it.
Marc