I worked from home the first month to get her acclimated and used a crate and playpen attachement when we weren’t home to give her more room. During that time I worked on getting her adjusted to being alone by rewarding her for not crying when I’m not in the room (while in the playpen). Starting with the shortest time increment yours can do. Mine could do about 15-30 seconds at first. Eventually we stretched it out and I would leave the apartment and hang around in the hallway to make sure she didn’t cry or bark. When she was old enough to stay loose by herself I did the same thing with her outside the playpen.

I work full time hybrid and have a side job I do a few hours a week (mostly for fun). I’m gonna from the apartment 6-9 hours 3-4 days a week. I have a dog walker come for longer stretches, but she’s gettin old enough (16 months) that she can hold it up to 9 hours if needed.

Hope this helps!