Alright, ogre time!

Main issues I’m seeing here is the lack of clear volumes in the form. Therefor everything falls a bit flat and it becomes hard to believe the pose.

Also, act out your poses! This will better help you understand where to place elements of the mannequin before committing to detail. 

As for the body type, too illustrate a heavier character it is usually easier to do that by keep secondary features, like facial features, small compared to the overall large mass. This will make the character feel even bigger. 

Think about push and pull and gravity when considering your lines. Too many broken up lines make the silhouette confusing to read. Therefore try to keep your lines simple and clean. 

Keep it up! | Artwod Feedback