I would say get involved with something you are passionate about because passion will shine through and keep you interested in the subject. I would also say enjoy learning! You don’t get to learn forever and you guys are in school during a really fast-moving period of time where science and technology is advancing really quickly! Have fun 🙂
My advice is to keep asking questions about why things are being done the way they are — science is all about pushing the boundaries of what we understand so it’s good to challenge the current way of thinking. Secondly, don’t be afraid to share your own opinions about things since you’ve got a different perspective to older people; your idea might be better than what we already ‘know’!