You'd better try to enter a cadet program or MPL scheme. If you go for the modular route or integrated route without a mentor airline everything will be much harder for you. As far as I am concerned, general aviation is almost non-existent in Singapore but would like to be wrong.
You have to be flexible and willing to relocate. There are several paths for you to gain those minimum hours: instructing, bush flying in remote areas, towing, parachute dropping and everything else that counts towards total flying time.
You will also be required to be in possess of a type rating and at least 500 hours on it. And that's a chore! It's not easy at all.
Remember, the key factor especially for a wannabe is networking, networking and networking. You ought to put yourself in a good position in the aviation community and get to know the right people at the right time.
You may want to use the Search function for more information.