Do's and dont's in maldives?

Hi! I'm from Philippines and I will be working soon in Maldives. I just want to know some stuff so i can prepare before my arrival in Maldives :
1. What is the cost of living in Maldives? How much money should i bring for my first month to support myself? Our accommodation and transportation are free except our food,though  we have a food allowance of usd150.
2. I read that it's a muslim country. What are the do's and dont's in terms of their clothing?
3. Does most establishments have wifi/internet? Is it easy to connect to the Internet?

Hope you cam help me guys. This is my first time working abroad 😀
Thanks in advance 😄

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