Hi Welcome and thank you for adopting<3
I would try and do as with puppies, take her out often, especially directly in the morning and after food and so on.
When she does her business outside I'd praise her immediately. Dogs like to poop where they've pooped before so if you have a garden or an area outside where you can leave one of her poops she'll probably prefer going potty there again.
Adult dogs usually have some kind of schedule for pooping so in time you'll figure that out
If she goes potty inside I'd take her outside right away, then I'd just clean it up, not say a word about it or be upset.
She sounds like a doll, would love to see pictures of her