I'd agree with what's already been said. Without going into detail we've been through a dreadful eighteen months at home, and I got to the point where I felt too weary and down to do anything at all, let alone go to the allotment.
I did, finally drag myself down there, and it's true what they say - fresh air, a little exercise, and a chat with someone different does indeed work wonders, if only for a short while.
Cover up everything that isn't entirely necessary just yet, and just enjoy an hour or so down there. I sometimes find that going very early in the morning when nobody else is around but the birds, the wind in the trees and hopefully, the sun is very soothing, and often helps to re-set your body and mind.