Hi,
My sister drove around here, in Greece for 10yrs on her british licence with out any problems, okay so if you are a resident then you are supposed to change your licence (at the police station) for an international one !...but no one checks up on it...
There is no driving test, it`s just a swop over of your licence and I think there is a fee involved.......
I don`t drive here so...... can`t tell you in any detail.
Do register at your local consulate as they will have details on where to go and what to do, to get your residence permit ect!(you do that at the police station also)
And will also have a list of other people in your area, if you want to make contact with them... if they can`t give you the names, you can leave your details, about your self on their notice board for others to contact you....
I.K.A. is like the national health care system here, they will be the organisation you go to for doctors ect, .... or your local hospital has a clinic you can go to that, I`m assuming that Crete will have the same systems as here in Thessaloniki.
Hope you enjoy your time on Crete...