Sorry to hear of your situation. But going in with a good attitude will make all the difference in the world. And if you hadn't noticed, most retirement homes are about 70% women.
I have a pair of Kef LS50 Wireless II speakers in my bedroom with an iPad (with Roon and Tidal) for "control." That's it. I use a MacBook Air in another room for the core and have ripped my CD collection to its hard drive. In a small apartment like you will have, you could skip the iPad and just use the MacBook Air. The keyboard on the MacBook Air would make it much easier to use. Very simple, but sounds great.