It's cumbersome, and not well documented. I expect it will be improved eventually.
If you copy and past the full URI of the community into the community search box and hit search, it will be added to the local instances list of available communities. Then search for just the community name it will show up for you to follow.
Why does this matter? I'm not aware of any meaning # has, outside of sheet music.
I would expect so.
But this community is for pictures of actual animals (rabbits for example) not people in animal costumes. So I wouldn't expect rabbit people.
That would be up to the admin of your host instance. Hypothetically they can ban you for any, or even no reason. There's no software or rules preventing it.
So I would suggest making an account on the instance you want to post these photos to.
Can you link for the rest of us?
I'm imagining a dystopian flock of flamingos. I don't know why.
I really like this photo.
At a glance it's a simple touristic type composition. But the lighting is acceptional. The people in the foreground are interesting. I keep looking at it. It's just perfect.