Wow! I really like how it looks so far. And it's your first costume?! I like how you tightened the bottoms of legs to get the poofy look, and THANK YOU for not just painting the snake eyes on the hood. Did you applique them? They look very crisp and vibrant. =)
Honestly that's all I can tell you. Nice job! Can't wait to see it finished. Oh, and if you look around I think you can find a tutorial for styling a Medusa wig somewhere. Maybe you can Google it and it'll pop up.
Loki (Agent of Asgard) - 5%
Spider-Gwen - 90%
Liara T'soni (Mass Effect) - 5%
Rapunzel (Tangled) - 30%