I have a few test users for this kind of thing. I generally have a couple of different browsers (Firefox and Chrome) to allow me to be logged in as both myself and a test user at the same time, as well as an incognito/private window for both so I can have some extras too if needed. This allows me to keep my admin screen up and running to adjust any user settings, etc without needing to log in and out.
Yes it is. Well, that work load doesn’t exacly kill you, but it is a bit annoying. But you can anonymizate yoursef (if it is allowed) and change that person’s rights?