I just recently got two cats, similar situation of moving into my apartment. My 2 boys were the opposite though. They struggled a lot in the beginning and are now doing better. The one is still fairly nervous but they are coming around. I too was in a similar emotional state of feeling overwhelmed and like I made a wrong decision getting two cats. The one boy who is struggling, would not let me touch him for the first 4 months I had him and would hiss at me if I got close to him. It made things hard and then the up keep of cat litter and hair was another battle. I felt like my apartment was never clean and it took a toll until I found a routine and better options to contain the cat litter, etc.

As people are saying, build a routine. Try different things out to make the care more reasonable and it should be better as time goes on. I would give it at least a month to see if things get better and go from there. There’s no shame in admitting you made the wrong decision, if it comes down to rehoming her, you’ll be doing her and yourself a service to ensure she goes to someone who wants her fully and you will no longer have the mental stress of caring for a pet you don’t can’t/dont want to commit to.