Aww ick, she is absolutely gorgeous. The poor little thing, that tank looks absolutely pathetic! She has definitely landed on her little pink paws joining your family.
Also I love the name, so cute. :3
I wouldn't worry too much about the size of the bin. I have a 45 litre bin which is 60cm long, and I've used that as a temporary bin for new fluffs. It's so much bigger than what she's used to, and she has so much more to do. What she has now will be enough to overwhelm her!
The Zoozone will be like setting her free!