studying abroad is an amazing experience! Often universities have special councilors for study abroad. They would know about which programs are safe, have transferable credit, etc. Also thing about if you want to study abroad ( where you take actual classes in a foreign university) or you want to do an internship ( where you work, often for free, in another country to gain experience in your field). You can often study abroad at anytime. However i recommend doing it your junior or senior as you have clearer idea of type of career you want.