ram1885 wrote:Can I apply for a work permit by myself and then look for jobs in Singapore ?
Should I search for jobs and the employer should apply for my work Visa ?
Google and the search function of this forum are a good start for your research on this topic. Lots of information available!
In short: Only a company willing to employ you can apply for a visa allowing work. The company will have to prove to MOM that they cannot find a suitable local for the job. Since there are plenty of people with three or more years SAP experience, most with certificate, this is unlikely in your case. Most companies would not even try - thus the majority of job ads saying "Only Singaporean or PR need to apply".
ram1885 wrote:Which is the correct procedure to reach my destination (Singapore)
Get a visa, then book a flight.
It would help tremendously if you are physically present in Singapore. Plan to come here for 3 - 6 months to look for a job if you are serious about it (and can afford it)!
Good luck, you'll need lots of it!