Johor Bahru? Lifestyle differences?

Hi there
I'm a third year medical student from Melbourne going on exchange for the year to Johor Bahru, I should be staying close to the main hospital there.
I'm wondering what to be aware of in terms of cultural differences? Dress? Eye contact? Just all the little things.
Perhaps you could describe the things that were the hardest differences to overcome? And possibly safety issues?? I keep reading about gated communities??
If you could do so that would be wonderful.
Cheers
Gaya

I came back to Johor after four years. Infact, I saw your post here and wished to help you about Malaysian culture, but I hope you already have good enough knowledge about Johor.

I hope you enjoyed living here :)