Alright bud luckily for you some of us here are gym rats and know what to do, lets start with the basics:
Two things,
1: theres the whole calories in - to calories out ratio
2: you actually want to build as much muscle as possible
Beginning at one, what you need to do is to determine what your daily caloric intake is to MAINTAIN your weight and then cut said calories off and you WILL lose weight, its that simple, its not in how much cardio you do, its not in how hard you pump your guns, but they do contribute later on it depends on how far you take this.
Its all in the diet, you can determine your daily calorie maintenance using this
http://www.weightrainer.net/gaincalc.html once you have used the calculator to find your maintenance all you have to do is cut 500 calories off of it for fast but healthy weight loss and MAKE SURE you get all your macro nutrients in for the day, which are:
Protein, Carbohydrates and fats. For your weight you need to do your own research on that, but if i had to guess i would say for you 170 grams of protein, 30grams of fats and 200grams of carbs but like i said for however your bodytype is you need to do your own research. And yes i said fats, you actually need to eat some fat to lose fats but they have to be GOOD fats that fall under the category of
Monounsaturated
polyunsaturated
Mostly found in olive oil, fish oil, avodacoes, peanut butter, sunflower oil.
Before i finish the first section when i mean a diet i dont mean go ON a diet i mean you need to completely change the way you eat permanently, if your naturally fat you have fat stores ready to go, fats are important in our daily lives they regulate our thyroid glands which does the clockwork of all our hormone releases throughout the day including testosterone.
fats that are stored in your body should be considered as emergency rations, but you live in the modern world now you dont need it, so intake your fats from good sources instead of relying on the stuff you already carry it promotes weight loss minorly in of itself.
You need to be aware of what your eating, this is too much to explain and you dont wanna info overload yourself so go and learn what Simple and complex carbs are. They're a maker or breaker for fat loss.
SECONDLY: Having muscle mass on your body BURNS FAT ALL THE TIME WHEN YOUR NOT DOING ANYTHING! thats right, its not much but it does, fat is easy to have on your body, its jiggly, an inbuilt food, light, and able to spread around your entire body. to get more of it all you gotta do is eat and sit on your arse.
Muscle on the other hand is dense, a type of tool, heavy, and compacted all around your body. to get more of it you have to work your arse off. But once its there its hard to get rid of unless you get lazy for regular long periods of time (an infrequent gym schedule, but if you go regularly 4-5 times a week and go on holidays for a fortnight dont worry too much) or just abuse yourself with too much training (yes you can go to the gym TOO often.)
It takes of lot of heat, which in your body is energy to maintain your muscle mass, so therefore just having some on you is burning constant calories, not much, but its there and it adds up over time and thats why fit people look fit and fat people look fat.
You should train according to your body type here:
http://www.bodybuilding.com/fun/becker3.htm if your fat tsk that sucks for you you need to get some intensity going with short rests between your sets until you get a little thinner, i would honestly start with the weights and just work with a 4 days of the week schedule, 2 days on one day off. This with a regimented diet and moderate calories from GOOD food with all your macros in it, at a 500 calorie deficit the weight will just shed off.
After that, its up to you whether you wanna pursue the bodybuilding lifestyle or not. Hope this helps.