Hey yes, add a person for each person you want to have access, only have yourself as admin that way they wont have direct access to entities.

Now you can use either conditional dashboards, or conditional cards to control what utilities are available to users. For example, my dashboards home screen shows general controls for everyone, but conditionally shows light controls to each user on the same page. I then have myself an admin dashboard with server controls, etc.

For the garage, that was an issue I sought to avoid, a simple automation that closes the garage if it has been opened for too long, and a toggle for that function as well as garage notifications seem to be plenty.

Only one incident where my jerry-rigged Shelly relay remote had the sensor switch miss, and the auto close - thinking the garage was open - opened the garage. I added an error state so that it would attempt to close again and notify if the garage is open after autoclose, which works if its blocked as well. All of this because MyQ doesnt provide local or API access lol

Edit: turns out I may be wrong about entity access, which is a bit of a shame, hopefully we can see that in a future update.