I've wanted to do some light studies for a while so my next few posts stand a chance of being photo studies.. I'll likely struggle quite a lot with them too...
This first one was done in about 1 hour.

My version

Original
Obviously my main issue here is that I screwed up with the main form and also seem scared of adding in too much shadow. While I prefer my colour palette that doesn't make it any better as I'm meant to be doing a study. I found the bounce light made it quite difficult. A lot of my details got lost too.