Hi Barbara, nice to see a fellow Singaporean on the board
You are in luck: March is an excellent time for a one-week kitesurfing holiday in Asia.
My recommendation would be Hua Hin in Thailand, or Boracay in the Phillippines. Both are good places for a beginner, and are almost guaranteed to have wind in March.
Hua Hin is the site of the Thai royal beach residence, and very convenient to reach from Singapore. Just catch a cheap flight up to Bangkok (Tiger, Jetstar, Air Asia) and then negotiate with a taxi driver for the three-hour drive to Hua Hin (about 1600 to 2400 baht). There are several places to stay right at the kitebeach (which is south of the town center), ranging from very acceptable budget accomodation (600-700 baht/night) to luxury hotels. The beach is very wide in March, and stretches for many kilometers (so you will always drift onto the beach if something goes wrong and you can't relaunch your kite). The wind is quite reliable in March, with an afternoon seabreeze that kicks in on most afternoons (unless it is cloudy inland) and which makes for very nice kitesurfing conditions. The water can be a bit choppy at times (but nowhere as bad as in Mui Ne, which as you have heard can be quite challenging!). There are several kitesurfing schools where you can rent equipment or get someone to help you work on your skills.
Boracay, meanwhile, is in the Philippines, an hour's flight from Manila. To get there, catch a flight to Ninoy Aquino International Airport in Manila (Jetstar, Cebu Pacific, Philippine Airlines) and then get on a connecting flight to Caticlan or Kalibo (SEAir and many other airlines). Allow 3 hours between the flights because you will have to pass immigration, wait for your luggage (which can take time), and take a taxi to the domestic terminal. Do not fly with Tiger Airways from Singapore, because they will take you to Clark airport, three hours north of Manila and with a more limited choice of connecting flights.
Boracay in March is excellent for beginners because the wind will be blowing side-onshore across a long bay which is shielded from waves by an outside reef. This is Bulabog beach. Inside the reef, you will have only small chop, and the water is shallow throughout the bay so you will not risk losing your board. The wind is very reliable. On the negative side, the beach is quite narrow and has trees, but just enlist the services of the one of the many kiteschools and their beachboys will help you launch and land. Overall, the conditions at Boracay are almost ideal for a beginner.
Personally, I am planning one week in Boracay in February, one week in Hua Hin in March, and another week in Hua Hin in April. As you can tell, I really like both places
And March / April is the right time to go.
I would be happy to help you out with contacts etc. Just PM me!
Saami