Advice for first time mathematics TA during the COVID-19 pandemic
Talk to the lecturer in charge of the course.
The lecturer (or professor, if that’s what your university calls them – different countries use different titles to refer to the equivalent positions) is your boss; if there’s something you’re uncertain of regarding how to teach their class, they should be your first port of call unless it’s utterly trivial.
So, ask them about how they would prefer you to handle things like office hours or grading; it’ll be important for all the tutors to be on the same page for those sorts of things anyway, so that students who were in one tutorial aren’t unfairly advantaged over students in others. Similarly, they should be familiar with what material will be covered in the honors vs non-honors versions of the class/unit/course/whatever your university calls it.