GMAT Strategy

Hello! I am completely new to gmat and decided to take this. Did some preliminary search and found it so difficult to achieve good score. Still desperate for good score like 600+. Can anyone please suggest what is the most organised way or shortcut to achieve this score? I am not being lazy. But it will apparently take too much time to getting to know what is gmat. I am a housewife who doesn't earn herself. But willing to buy the required books if there are some really really helpful. I don't think I can afford the online courses. Thanks beforehand if you read and reply to my dummiest question.

I'll say there are no shortcuts for this exam. Take the time and do it right the first time and you will be much happier than if you try to rush through everything.