Nice job on the TARDIS and Daleks. The Daleks look like Daleks, so don't need any extra work in my opinion. I tried some a long time ago in LDD (check out my own MOCs) and they were overly complicated.
As for stickers, I've made my own in MS Paint before now. Just measure set the drawing size to the size of the sticker you want.
Very cool. On my own (quite similar) TARDIS I have the top pieces in blue instead of black, which I think looks better. Those Daleks look great. It's hard to pull off a minifig scale Dalek, but there's no mistaking yours for anything else.