I'm happy for you that you decided to pursue medical school. I hope you make it. But Im concerned you may be putting the cart before the horse here. You likely wont get exposed to PM&R until late M3/early M4 year. Medical school is demanding. Internship is demanding. Will you make it until then?
Based on your other questions here on this forum (What are the hours? Is PM&R competitive? Will I get paged?) it appears that you are looking to get into rehab for all the wrong reasons. I don't know your background or your experiences, but I haven't seen any posts from you regarding other facets of PM&R that attract you to the field. I may be mistaken, but you seem to be looking for the easy way out. Despite appearances, our field is not easy. It can be intellectually challenging. Emotionally draining. Choose a field for the wrong reasons, youre stuck and disgruntled. Then you bring that home with you. To your family. It becomes a grind. Stressful. Exactly the thing you wanted to avoid in the first place. The lifestyle in PM&R is good, no denying that. But it should never be the only factor to consider.
That being said, I can't imagine myself doing anything else.
I have my reasons. What are yours?
I suggest contacting physiatrists in your area. Shadow. Learn yourself.