Training without direction will most likely result in frustration when you start hitting the gym. Even for workout veterans, if you try to make a change or addition to your workout routine, you have to be clear on the results you expect for your hard work. Muscle growth requires muscle specificity, overload and recovery. A weight loss plan requires a combination of dietary restrictions and physical activity to decrease body fat, while maintaining muscle.
You've got a goal. Let's give that goal a plan.