Q: how do i lose weight but also gain muslce because i was told that if i do cardio and weight traing that one is cancelling the other out

A: If you are a beginner, slow weight loss through a healthy balanced diet combined with weight training and little or no cardio will also allow you to build muscle. You can get a complete sample program by filling out the Fitness Guide specifying weight loss or tone as your goal.

However as you progress in your training you will not be able to continue losing weight/fat and gaining muscle at the same time, so you will be well advised to concentrate on one or the other at that point.