Oh she is beautiful! First off, a huge thank you for rescuing her! Pet stores are always about the money..its heartbreaking. Congratulations as well! I have had birds for nearly 50 years and also do avian search and rescue where I live. I have learned many things over the years but there is always more to learn. There is some really great advice here! Definitely find a good, certified avian vet and get her in for a wellness exam. It isn't absolutely necessary to put her against a wall or 2, you can also partially cover her cage but it sounds as though you are making progress! I have rescued many birds whether from pet stores, bad situations, etc. One of them is an orange winged amazon who didn't come out of her cage for a year, now she is never locked up. Talking, reading, singing softly are good ways to make her feel safer. Sit by her too. Dance with her. You can also go on yt and search for parrot music/tv which is awesome. Ensure you check into all the "safe" list about foods, wood, toys, etc. Look up parrot enrichment as well. There are many places to go for diy toys too. And of course, spending time with her. Try to avoid anything that might startle her, move slowly... Just a few ideas. Also, I like to keep a scrapbook for my birds which include when and where i got them, photos, medical info, behaviors, favorite everything, words and more. And because I rescue birds that have gotten out, ensure all possible safety measures are in place. A birds wings may be clipped but then can still fly. Good luck to you both!!!! Wing hugs!