In order to get bigger muscles successfully you need to realize three very important things about muscle building that majority of the new lifters fail to understand.
One of the first things that you should do in order to build muscle is to focus on a single thing. I see too many guys who want to achieve too many different things at the same time. I know that this may sound weird, but what I mean by that is that there are too many new lifters who want to "gain a lot of muscle" and "lose a lot of body fat" at the same time.
You must realize that these are completely opposite goals and in order to achieve the optimum results you can only focus on one of them. If you want to build muscle then you'll need to focus on a completely different eating and training plan than you would if you would want to lose body fat. For the next 6 to 12 weeks focus on bulking and forget cutting.
Second very important thing that so many new lifters fail to understand is that diet is the most important thing. It doesn't matter whether you'll go to the best gym in your area, it doesn't matter whether you'll do the right exercises or if you'll have the most expensive supplements in the world - you'll see very little or no muscle gains at all if you won't follow an eating plan which will supply your body with all of the required nutrients to make it grow.
Finally you've got to understand that the single most effective way to trigger the maximum release of anabolic hormones within your body is to use heavy pressing movements and focus only on compound exercises. I see so many newbies who stick to isolated machine exercises simply because they "don't like free weights", but it has been proven by time and experiences of hundreds of bodybuilders from all over the world that the best way to gain muscle for newbies is to focus on compound exercises like deadlifts, squats, bench press and so on.