MIT is one of the few schools for which international applicants get interviews just like US applicants. Once you register for myMIT, without even starting your app, you should be assigned to and EC (if available–if your interview was waived for any reason by MIT themselves and not that you had the chance to do an interview but didn’t, it WON’T impact your app negatively at all!).
I had my interview in October, without even starting to fill the application.
There is no need for you to worry.