For an entertainment company, the culture can be more open and relaxed. However it doesnt hurt to be a bit overdressed and put on the normal 'smart' office attire despite people around you weearing jeans. After all this is an interview.

Read about the latest entertainment news especially the business/marketing/branding side of it. Don;t just know the gossips but do know about the associations, distribution channels, vendors, associations in the industry etc.

I wrote 50+ pages of e-book about interview tips and tricks in Malaysia scenario (see signature) so it's a bit difficult to put everything here. NEvertheless, i wishh you all the best

All the best to you...sometimes people say, the harder it gets the more worth it for u to get it...

I think that's a good move. Starting slary is really just a starting point. If you think you'll learn new things and boost up your resume through the company, just go for it. and yeah congratulations and good luck!