As a new product manager, onboarding can be an overwhelming experience, but with planning and proactive communication, you can make it less daunting. It's essential to ask how the company onboards new hires during the interview process, set clear plans for your first 30, 60, and 90 days, organize your bookmarks for efficient access, review your team's roadmap and backlog to understand their priorities, and take note of your first impressions to gain a nuanced perspective later. Additionally, setting up one-on-one meetings with as many people as possible, writing and sharing a "how I work" guide, asking dumb questions, seeking regular feedback from your manager and coworkers, understanding how your team prioritizes work items, and being open to learning and adapting can help you hit the ground running and contribute value to your team quickly.