Great answer, Strwbry! Taking time in your car (parked — driving is too stressful), or even stopping at a Starbucks or similar for 30 minutes or so before arriving at home can help a lot. I even have this issue after coming home from shopping or being with other people. I’ll even hide in the bathroom for a while just to decompress.
I feel the same right after waking up in the morning. I can’t deal with conversation right away. So I get up much earlier than anyone else, so by the time anyone else wakes up, I’m already transitioned.