heya wel im not being mean by saying this but tips, put some detale in like muscles and have a picture in your head first nd for that pic just a bit more shape to the head too lol im not that gud at drawing either soooo practice makes perfect XD
I did try to do some mucle lines when i was 1st drawing but it i must be doing it wrong cause it looks dumb so i got rid of them i will try some more though