US med schools generally require you to complete prereqs at a US school. Getting foreign transcripts evaluated & accepted for med school admissions is expensive, slow and error-prone.
Also, the concept of changing careers into medicine is considerably more prevalent in the US. As is the concept of student debt.
That said, if you want to spend some time overseas, studying or not, I think that's a great idea. Not an optimal path to med school, but a very good use of time.
Best of luck to you.