Well I'm dressing up like him too and I am 11!! haha...
Well what I am going to use is here:
1.) Deuce mask (home-made you can get a mask base from a raft store, I have all of them even Danny)
2.) Black Hoodie sweatshirt
3.) Black or Dark red base-ball cap (Don't use the flat-rimmed ones because he doesn't wear them)
4.) Black shoes; Preferably Converse Tennis-shoes
And when you put on the mask tie all of your hair back because there should not be any showing. If I am forgetting something you want you can add to the suggestions I gave you.