Congrats on deciding on your future career choice! And, I might add, what a great decision you've made!
Now it's time to get involved. Shadow residents/attendings. Take extra call with them on the weekends or nights that you have free. Get involved in research. Do you have time to take a research year? Attend orthopaedic courses and meetings - many have medical student scholarships that will help fund the trip.
It is a rewarding career and well-worth all the time and effort you put in now.