Help with hair and clothes!

Recently started trying to do more complex poses to help improve and I've realized I've got no clue how clothes fold.😭 I also don't know how to make it look like his hair is on the floor? I like the bangs part I just don't know how to finish the back. Any criticism is welcome!!

Recently started trying to do more complex poses to help improve and I've realized I've got no clue how clothes fold.😭 I also don't know how to make it look like his hair is on the floor? I like the bangs part I just don't know how to finish the back. Any criticism is welcome!!