Rescue outdoor only pyr experience?

We recently adopted a 3-year old girl from a local rescue. She’d been overbred and lived outside in Alabama her whole life. She’s super sweet but is having a really hard time adjusting to being an indoor dog: scared to go under doorways, only perks up outside, is hard to convince to come in, doesn’t seem to know any commands, etc. It’s very cold where we are and we feel so bad “forcing” her to come in the house. (Where we give her lots of pets and love and space as she needs). I’m scared she’ll never want to be an indoors dog, and I feel so bad for the rough start she had in life. Would it be better to give her back to the rescue and suggest she goes to a home where she can live outside? Oh and she is scared of staircases, and other than our kitchen and living room all the house is up stairs, so she’s alone downstairs a lot. :(

Any advice appreciated, we would love to keep her but we can’t have an outdoor dog and especially if it makes her unhappy to be inside.