Meeting PhD advisor during first year (coursework year)
Your first meeting(s) with your advisor should be...directed at answering this very question.
How should your meetings going forward be structured? What topics should you plan to discuss? What's your schedule for making progress toward degree requirements/prelim requirements? When can you start considering research directions? etc.
You might be used to interacting with professors as people who stand above you in some way, people who you only approach with deference and who are judging you at every step. A PhD advisor shouldn't be that person. They are training you to be their peer and colleague. It is expected that you will need some help along the way, and they should be there to help you, so you should feel free to have open conversations about what that advising relationship will look like between you. The earlier the better: often conflicts arise when there are mismatches of expectations. Set shared expectations to avoid conflict (including internal conflict: stress, anxiety, etc).