My student philosophy is that anyone can learn anything. However, to succeed and enjoy your graduate school education you need to create good relationships with your mentors and those you look up to and get involved in student life by joining things that resonate with you whether that be student councils, clubs, intramural teams, etc!
I found being in a graduate university environment to be very beneficial for having access to experts on many topics. I would encourage new graduate students to not be afraid to reach out to various professors and other graduate students that can help guide you and offer advice.
Although I think most prospective grad students have been told about the importance of picking a study/project that interests you, I think it's also really important to take some time to see how you interact with your supervisor and lab. These will be the people you work the closest with for the next several years, and help provide support to you in some of your toughest moments.
Finding your passion will take you to the right place at the end of the road. Just keep doing your best and appreciate all the opportunities provided along the way.
When an airline asks you to sign a waiver for your guitar just scribble quickly in hard to read handwriting "no thank you" and hand it back. Later if they damage your equipment you can claim you did not understand why they handed that waiver to you.
While it's true that you should work hard to reach your goal, burnout is real. Allow yourself to take breaks when needed; take a nap, play video games, and laugh at some memes. Life will feel less annoying.
