I am really struggling with this too.
There are things I've liked about lockdown and furlough, e.g. not having to go anywhere, speak to people, be constantly masking, have visitors in my house. My anxiety has been much reduced compared to pre-lockdown life, though I do find it stressful not having time alone & have to often shut myself in the bedroom and ask people to leave me alone for a bit.
Apart from exercise I've not been out since March, but now we're supposed to be moving into a 'new normal", I am feeling very anxious and stressed about how I'm going to manage. E.g. just the idea of going to a shop and having a whole new set of rules to learn is making me really anxious - not knowing what the layout will be, how will any rules be communicated, how will i know if I'm getting it wrong, what are the rules about queueing, what if people aren't following the rules, how do I know how much I'm expected to relax the rules?
And that's just shops. There will be rules to learn for every different situation - workplace, transport, public loos, all the different social situations, etc, etc. Every time I leave the house there will be a whole different set of rules as well as working out the nuances and interpreting other people's take on each rule. It's just exhausting and makes me never want to go out again.
I think I've spent my whole life observing and learning unspoken rules so I could mask, and now I've got no time at all to absorb completely new ones. At least when I fail at masking, other people just think I'm weird. If I can't get the new rules right then are people going to get aggressive or angry with me and see me as causing danger?
I've no idea what the solution is. I think I'm just going to stay home as much as I can and hope that the old normal comes back at some point. I can work from home probably for the rest of the year, so I'm just putting off working out what to do until then. It's a relief to read this thread and know that it's not just me.