this last one also looks much better than the previous one.. It is always good to experiment with different techniques, squinting helps so much, here is just a small list of squinting don'ts from Richard Schmid:
1. It is not helpful to determin color. For color open your eyes.
2. It is not meant to be a way of seeing true values in subject. Actual values will be lighter with opened eyes (not for darkest darks, they are still as you see them while squinting). So squinting is for comparison which value is darker or lighter to one another, not for seeing and painting actual shades.
3. Some common sense is needed. Do not to try to simplify too much or on the other hand paint too small detail. If the shapes are very tiny and numerous, view them from the greatest distance practicable, so they merge to form a single value.
4. There is natural tendency to simply forget to keep squinting and open eyes to see vague are more clear.
5. Be careful of reflected lights within shadows. They are never as light or as colourful as they seem at a casual glance. Squint down at them and you will see that they are more likely same value as surrounding shadow area.
6. Never squint at your canvas! Always look at your painting with open eyes!
Hope it helps
. You are hard worker, keep going man!