At this stage of the game, I'd suggest that patience and perserverence are your key goals.
I'm taking the difficult route, and starting off with a face character... Jango. But I'm doing all of my research... I'm studying the character and pouring over every single picture I find from every angle I can find. It's taken me many months to get to where I am now, and I'm not finished yet ( as an example, it took me well over two months just to make my helmet ). My squad is waiting patiently for me to finish, as I'll be the first Jango in the Canadian Garrisons Capital City Squad. I'm looking at the beginning of April as my finishing time frame.
I've still got a ways to go, but I've got a goal in mind and I should be able to attain it.
You've got tha basic ideas down, now you need to refine them. You've got Boba down from 20 feet away, so now your goal should be to get Boba down from 2 feet away. What that means is, if some one ( a fan or kid for instance ) is standing within 2 feet of you, then they will believe with out any doubts that you
ARE Boba Fett. If you can pull that off, then the 501st admission should be easy.
I've said it before, and I'll say it again... it's all in the details, because that's what makes a good costume a great costume.
So keep up the good work. Do some more researching and you'll be happy with the end result, because in the end it'll be worth all the extra time and effort, trust me.