Your academic advisor is both an interpreter of the university environment and a facilitator to your experiences here that relate to your undergraduate degree. Above all, your advisor is invested in you having a rewarding learning experience. Be open and honest with your advisor and trust that they can help guide your decision making.
Your academic advisor plays a particularly important role in your first year simply because you will encounter so much about Oregon State that is new to you. That's why you need to have a face-to-face meeting with your advisor at least once a term during your first year. After that, the frequency for meeting with an advisor is determined by your major.