Should I avoid working part-time during my first semester?

You do not necessarily need to avoid part-time work, but during the first semester it is sensible to prioritize adjusting to classes, commuting, and a new routine. Once you understand your timetable and coursework, start with hours that leave enough capacity for study, and reduce or pause work if it becomes a burden. The suitable balance differs by university, faculty, and student, so check the university’s official guidance as well.