Yes, what interesting conversation, insights and identification with your T. Hope you can use that.

I'm sure you will use your experience now when you're a T too. I think your knowledge of how many clients you have/can work with, etc. will help you stay "comfortable". Are you allowed to, have you tried covering the window? True, only those clients who are braver might knock to see if you are there but that might cut down on some of the distractions. Maybe a note on the door; "if window covered, in private meeting" (with yourself :-) and just not overdo covering the window.