Welcome! The first thing I'd suggest you do is read our free e-book The GMAT Uncovered. If you have an account with us (which you do, if you took a CAT!), then this book is already in your student center - go take a look.
Next, we are always happy to help however we can. We do need more specific information, though, when you ask for advice. When you ask for help on an entire question type, my answer is going to be "read the book, go to class, do the homework" - I can't type out the entire book here, right? :)
It sounds like you're mostly just getting started, so dive into the work a bit and see what your strengths and weaknesses are. Then you can ask more specific questions - for instance, it takes me too long to read the passage, or I'm struggling with inference RC questions.
You can analyze your first practice test using this article:
http://www.manhattangmat.com/articles/e ... -part1.cfmThat will give you lots of good data about your strengths and weaknesses, and you can use that to set up or help prioritize your study plan. If you want to discuss anything after you've done this analysis, let us know!