As for the user admin bar: by default, WordPress shows an admin bar at the top of the screen for all logged-in users, and this setting is not determined by Sensei.
The quickest and easiest way to disable the toolbar is to head over to log into WordPress and head over to Users > Your Profile > Show Admin Bar. Here you can uncheck the option so it won’t show up “when viewing site”.
For other options, I recommend checking out these help guides: