"Lucky " The Survivor!

I don't know how to take care this kind of bird, my daughter saw this 5 months ago in our backyard while the cat biting her feather.
Poor little Lucky... But good to say she's a survivor.

Look at her now, she's very sweet and we're happy to have "Lucky "our first bird ever. But they told us that in order to live longer, we need to buy another one because they can't live alone. I don't know if it is true.
My husband created her little house. 😊