Hi. its coming along nicely I think. The issues you have with the knees can be fixed later. If you plan to make an animation mesh you will probably end up having to do a retopology(). If you care for advice from an old man , remember to have some sort of version control. What i do is usually to save the file in a new name once in a while. say e.g. animebody001.blend. Then when you do something irreversible, or semi-irreversible you have something to go back to instead of trying to ctrl Z your way back. Also I have had a lot of value from learning basic surface anatomy (Oh the pleasure af having to look at naked bodies and being able to call it research :-))