Go and read the 2nd post in this thread, apply that information to your bodyweight, come back with questions.
And no, steroids will not just pack on muscle and cut fat.
Controlling what goes into the hole under your nose will determine if you start to lose fat, then controlling how often your feet move your body from point a to point b will also Control how much energy you burn, 10 000 of those a day is a good place and then you combine those two together will determine how much fat you will lose.
How you train will also determine how much muscle you will grow.
