Hi Judson,
I looked at some of the other portraits you have posted on the forum and I think you are doing a good job of handling the paint, and a nice job with your paint color. In my opinion, it would help you to do some drawing exercises. There are some threads on this forum about HOW to measure, different techniques. You might hold your brush straight out in front of you and note that the head to chin is a certain length of your brush, then also notice that the chin to middle of the chest is the SAME distance. Mark that as a guideline on your canvas and so on and so on.
This particular portrait seems to be out of porportion but your others are in much better porportion. This just means you need practice
with your drawing to get more consistent. I know drawing with charcoal or pencil isn't as exciting as doing a full fledged portrait, but after doing some drawings your portraits will be that much better.
You could do some drawings of objects and then people. Just a face or even a hand. There are many drawings posted and you would probably get helpful feedback on drawing if you posted drawings.
I hope this helps. Above all, stick with it!
Joan