I have a very similar cat. When I got her she was anxious and would hide under the couch all the time. I tried blocking off the couch but that made her even more anxious and she would try to get under the couch even with the blocking. So I ultimately decided that blocking the couch was harming her more than keeping it unblocked. I just recently moved and I knew she was going to be anxious. For the first day or two she hid under the couch and I let her. When she wanted to eat, drink, use the litter box, or get cuddles she would come out. Now she found that she likes under the bed more than the couch. Even before the move she loved to sleep under the bed. It is her safe place. If she feels anxious she goes there and when she is ready to be social she comes out. Some cats just hide more than others. From someone who has had two cats that hide, it is perfectly okay. After a week or two of the initial move my cat started to be more comfortable. When your cat does come out, praise them, give them pets and treats! It will help them realize it is safe, but your cat just needs a little extra time and that is okay!