I'll give you some raw footage, if you want. What you edit would not be considered the official final cut, because that already exists. But if you wanna do it just for practice...
There's also fake trailers. I've become convinced that mashing up some fake trailers is a good way for an editor to get good practice, and hopefully gain an audience. For what it's worth, this is one of the next projects on my near-future to-do list.
If you want you can help me out. I need a trailer for a 7 episode doc series and I haven't started yet. It would be great to see how someone else would approach it.
If you want you can take a look at the first 3 episodes online.
I would absolutely love some raw footage if you could do that.