Hasta La Motion!

I have some difficult footage with a blue/green background and some annoying shadows.

I know there is no magic button to pull a good key, especially when the original footage is messy. I have something to look at, but it doesn’t look at all professional. I have attached a pre/post and my key node setup. Please note that white is not going to be the final background, it’s just to show you guys.

Any pros out there with advice on how to approach a hard key? You can see I have some bad outlining on the arms. Maybe I’m just screwed by the shadows on the original footage, but let me know if you guys have any ideas on how to solve my problem. Holistic or specific answers totally appreciated.

Oh and please forgive me if my script is a sinful mess. I’m a newb.

Thanks so much!
Paul