Hi frenchwr,
When starting off, it's important to define your goals and abilities. As has been mentioned, you should take a FULL-length practice CAT test (you can download 2 for free from
www.mba.com). The test will take almost 4 hours to complete, so make sure that you've set aside enough time to do so. You also need to define your score goal (which will probably be based on the schools you're planning to apply to and any scholarships that you're interested in).
To help you set your expectations, it's worth noting that most Test Takers take 3 months (or more) to hit their respective peak scores. During that time, 10-15 hours of study per week is common with plenty of "review" built in so that you don't just "blow through" early material and forget the concepts later. It's a big process, but the GMAT is a predictable, standardized exam, so you CAN train to CRUSH it.
Once you've taken that practice CAT, you should report back here with your scores so we can talk through your options.
GMAT assassins aren't born, they're made,
Rich