You are asking a lot in this post. You can get a lot of opinions about the "roadmap" to matching into residency from the countless posts on this topic on orthogate, SDN, reddit, etc.
What it seems like your core question, and the one for which there is less info, is what are your chances of matching into ortho as a DO. In short, it is not easy. MD residencies are becoming more and more competitive, and unless you rotate at a particular program, I think your chances of matching there are pretty close to 0. Even with a strong rotation, you will need to have as good or a better application (board scores, research, clinical rotation grades) to keep yourself in contention for a spot. If you look at MD ortho residency programs, there are very very few DO graduates, and I can only see that number diminishing as the number of US MD graduates going unmatched seems to be increasing.
As for matching into a DO ortho residency, it is probably your best shot, but spots are very limited. I would suggest you find an advisor with knowledge of the DO programs, but at the very least you need to have the standard qualifications (board scores, letters of rec, research, clinical grades).
You are still in the relatively early stages of medical school, but if you are truly serious about a career in orthopaedics, you need to commit soon. Find a mentor, get started on some research, learn more about the field and the potential programs you can get into.
