Ah a closet. No stress, no stimuli. Does not sound like a bad idea to me. I would think that if you could find peace there, it may be other places as well.

Is there anywhere else you can recreate these feelings? Like maybe a garden, a portion of a porch with a rocker, or
some other cozy spot? How about a candle lit room, maybe even the difference in lighting will help.

If not, how about creating a unique spot for yourself. With everything you like in it to make you feel secure and happy.
Maybe even little snacks to feel better.

I try to do this. I find it helps to place my favorite things around me.

Best Wishes,
Colors