Can any of you share success stories of two spayed female cats becoming companions?

I have a 2 year old spayed female Tortie-point Siamese I have had her for 15 months now. Her companion cat of 8 months died of FIP several months ago and now, a rescue kitten my daughter found was going to be euthanized tomorrow if I did not agree to adopt her. I did. She will be spayed and vetted tomorrow and I am to pick her up Weds. morning.

I have never had two female cats and I am hoping they will adjust to each other. I have always had males, or male/female combos.

Of course she will be kept in her own room while adjusting, but, have any of you had good luck with introducing two unrelated female cats? Worst case scenario I will re-home her if it doesn’t work out. My female ‘Mia’ is affectionate and easy going, but, she is also rather a princess type. What are my odds of making a good match with two females?