Honestly, you're far from being on your own.

It's basic film language; showing instead of telling. Books can get away with exposition, moreso than movies. Which is why I hope that scene with Neville, in DH, where he's guiding the trio, doesn't just include him telling them what they've been up to. They should show Ginny, Luna and Neville's shenanigans in a montage, at the very least, especially with two films to fill!