I have a chromebook as well and have a similar problem. Ankidroid works fine for studying, but is not great at managing cards and decks. I do that type of stuff on my work computer (Windows).
What you might want to do is find a machine that can support the full version of anki (borrow a friend’s, perhaps), install the software, import all the decks you think you will need, suspend all the cards you are not ready for yet, sync, and uninstall. You can un-suspend cards when needed from within Ankidroid.
It’s a bit of a pain, but that’s the way it goes.
All the Textfugu decks are available here: downloads page.