Going to Kuala Lumpur, need some advice! :)

Hello everyone,
I'm a Polish Student and in August I'm moving to Kuala Lumpur and I will be studying in University of Malaya being a member of Erasmus Programme. I've never been to Asia and I know very little about Malaysia. I need some tips or advice, especially when it comes to finding a flat to rent. I would be grateful if you could tell me something about living in Kuala Lumpur or recommend me some websites I could find some information, for example about the accomodation. thanks in advance!