its not a good idea to start with the entire body. focus on single parts first. create them, redo them and recreate them. Later on you can bring everything together to form a human...this itself is a hard task itself.

your biggest problem right now are (beside the anatomy) the missing edge loops (polygon flow in your mesh).
create one ear and reacreate it another way and look what method brings you the best results and why.

step by step

cheers