So if you don't start research stuff until after 2nd year, and you're anxious to get going ... there should be plenty that you can do in the first 2 years. First, our school (and perhaps this is common?) has a couple of "courses" where you work with a doctor 1 afternoon a week ... basically a shadowing opportunity. I spent one of them with an orthopod in 1st year, and went to the OR with him a few times. I didn't get to scrub because I spent most of my time with him in clinic, but if you have OR experience already as a tech, then I'm sure you'd get some scrub time.
If you don't have a course like that, it never hurts to just contact orthopods in your home hospital to see if you could work with them a little bit. Generally, you won't have more than a few hours every other week or so to do this, so it's unlikely you would annoy them ... unless, as I mentioned before, you're just that type in the first place. If you study ahead and show some competence (they rarely expect more than just anatomy at this stage ... and for me not even that since I hadn't had anatomy yet), your enthusiasm should be well-received. Plus, with your OR experience, it's unlikely you'll be "that" med student -- the one who barges in and contaminates everything, holds everyone back, and is generally a nuisance.
Beyond those experiences, you can also get an early start to your research. Considering many if not most students who go into 4th year with ortho publications had to do that in the first 2 years, it's obviously possible to get meaningful work done in your first 2 years. Contact orthopods and see if they have work for you ... if you can offer special expertise, even better ... but even if not, as is the case with most students, you should be able to find something. If you do research with an orthopod in the first couple years, s/he should surely be glad to have you accompany them to the OR occasionally as well.
From my brief experiences, orthopods, and surgeons in general, enjoy their work greatly and generally love to show others what they do -- with the caveat that they also hate wasting time and dealing with puppy-dog type med students. Even more than that, they love discussing the technical aspects of the job with people who show some competence in that regard.
From what you've said, sounds like you'll have a blast. Relax and enjoy the ride.
b