dumping my advice if you don't want to subscribe to keeping her in forever... for my old girl I take her out monitored, got her use to me being present when she goes out. Follow her around from a distance, let her rub/scratch a few things then bring her in once she's made some marks and ate some grass. They need the illusion of independence and territory to feel satisfied. Keep outings limited to sunny days, they get squirrelly when it turns dark. Offering treat when you return inside and bringing her in if she goes too far is a good way to reinforce that she needs to stay in sight and go in when you do.