text: Internships would be a great asset to your school record, could connect you to people who can write those very important college recommendation letters and can give you some incite into where a career in physics could lead.  Talk to your physics teacher and other  science teachers.  They could point you in the right direction.  If you live close to a university or college, pop by their science department.   Often you will see flyers for visiting speakers, public lectures and all sorts of events that could connect you with people that can give you guidance and advice.