A new cat is a good idea, but not immediately. What is recently? When did you move? If it was, as you say, recent, and you didnt introduce the cat to the house one room by another, and in the beginning in a small cozy room she could first get used to, it would be logical that she is meowing.
She is all confused since she lost her territory, and nothing is familiar, not even the furniture. Considering the fact that buying a new closet to put in her old house when she still lived there couldve already stressed her out for more than a week..consider what moving did to her.
Im not saying it is impossible to move a cat, and it depends on every cats personality. But if you give them small doses of it, they can handle the stress a bit better. If it was, like a matter of weeks ago, I would give her her own cozy room. like the bathroom, or something, with a blanket with your smells in it, a feliwaydiffuser in the socket, some toys and see how she does. If she feels at home quickly, then let her visit the next room. Not two at the same time, one a day, possibly even every two days or every week, depending on how she s adjusting.
If she is meowing out of boredom, and it has been several months, then by all means, get her a companion. She is still pretty young and playing is definitely her life right now, and that is always more fun when you have someone else to play with. And although humans are fun, they also arent full-time playbuddies. Just take care to introduce them properly (see other topics on this forum)
Hope she settles down quickly for your and her stress levels' sake