Volunteer in an active ER, you will be exposed to most specialties of medicine to help you make a decision if it is a field you want to pursue. You show up consistently, the staff get to know you and they take you under their wing, you will see a lot.
An urgent-care can take X-rays, co-pay should be much cheaper. If it is fractured or a severe enough sprain, you end up getting referred to ortho anyway which adds another round of bills.