Drawing on my experience in academia and research, I would advise prospective graduate students to embrace challenges. When confronted with a difficult situation, tackle it directly rather than trying to avoid it. You'll often find that the solution emerges as you delve into understanding and addressing the challenge at hand.
Lean in, stay curious, and be open to the opportunities that will come your way. Don't be afraid to reach out to your professors for ideas or support - the faculty affiliated with this program are well connected and eager to continue strengthening their existing networks. Your cohort will also become like family. Don't be afraid to open up and share, ask questions, and provide support for each other. Lastly, embrace all the prompts for reflection. Those are the opportunities to think critically about yourself, your work, and apply meaning to what you've learned. Enjoy the ride!
Sometimes as an undergrad it's easy to stay 'behind the scenes' and just go to classes and complete what's required of you. But grad school has SO much to offer, and there are opportunities to gain new experiences around every corner that contribute to both personal growth and look great on a CV. I think getting involved is so important, and creating new relationships with faculty/other students is key.
Make sure you need grad school for your future career before you do it. Reach out to other grad students while you're in undergrad; most people will be more than happy to share their experiences.
Choose a supervisor who makes you excited about your project. There will be times when your project does not go as planned and reminders of that enthusiasm and why you are doing the work are crucial to continuing through the hurtles.