The first picture is very cute, however, I agree the proportion is off. The hand that holds the scythe should be a bit bigger. And sorry, but I can't really make out what is below her skirt.
And for the second picture, I think that pose is lovely. I absolutely love her feet and hands. I think the breasts would either be pulled down a little by gravity, or be squished a little by the arms.
Overall I think you did a good job! :D