non aiesec people can apply by contacting the aiesec of their city.
(there used to be 13 Local committees in 12 indian cities when i was a memeber... dunno the current status.. google pe find out)
but depending on what kind of internship yure looking at it can take varying amounts of time....
so the earlier yu start the better!
yure qualifications and everything will be scrutinised by a student nominee board who will interview yu and all, once they get yu an intership...
instership stipend isnt assured, dpendson the company..same goes for staying, so, if yure looking for superb exposure and have deep pockets go give it a try...

atb