You can train rabbits to go back to their cage themselves relatively easily!
I actually kind of taught this to my rabbits by accident, but I'm glad it worked out that way!
Find a treat your rabbit likes (I use papya tablets). Hold the treat near the cage and don't give it to the rabbit until it goes into the cage. If your rabbit won't take treats from you yet, just put the treat into the cage so that when she goes in on her own, they'll be a treat in there waiting for her. Your rabbit should learn to associate going back into its cage with getting a tasty snack.
Eventually you can associate a command with it. Like tell your rabbit "Go to you room", then give it a treat when it goes in it's cage. For me, every time my buns head the sound of the papya tablets shaking around in the container, they run into their cage and wait for me to give them one.
Try not to chase the rabbit around to take it out or put it back into the cage, if you can help it. You want to teach her to trust you.
As for the aggression, like everyone else said, that should improve once she's spayed.