When you get to the airport in Male, Maldives, it is best to convert your money at an ATM, for the best conversation rate. Tips are best in their currency. Most places on the island of Male will want you to use their currency. However, at the resort you may use USD.
Milaidhoo will have a personal concierge that will give you a phone to use while at the resort. Room service is open 24hrs.
Don't forget sunscreen and bug spray.
More modest dress is asked in the main city. T-shirts and shorts are fine. At the resort it is acceptable to wear swimwear, but they ask for your to cover up in the restaurants. Nudity is against the law.
Weather in March in the Maldives is around 88° F or 31º C with possible short rain showers.
Water visibility in March is excellent.
When you get to Dubai it is best to exchange your money in the Dubai International Airport. You may use your bank card here but it is best to double check your exchange rate through your bank. USD is also accepted in many places in Dubai.
Women can wear shirts, tops, t-shirts, skirts, shorts, trousers, jeans, and dresses in Dubai. Women can wear swimsuits and bikinis on the beaches.
For desert
Weather in March in Dubai is around 83º F or 28º C possible rain can occur but it's mostly dry.