Hi & Welcome to our family! We're happy you joined. Good for you for taking Ruby into your home. It sounds like you are doing all the right things with her. She needs the comfort and assurance from you so she can adjust to her new home. Keep up all the love you are showing her.
I would never let her have the run of the house unsupervised, with or without your dog. There are too many hazards for her, wires, windows, etc.
Please keep us updated. We love photo's, so please post one when you can. We are here for you, so any questions you may have, please ask away!