i'd say not to take risk of changing brakes on ur own....
firstly.....take car on ramp....remove the front two tyres.....u'll see the big hub....just losen dat big bolt....remove the hub....simillarly remove the rear wheel's hub.....check for hand brake is released.....now u can see the brake liners...drum/disc brake arrangement.....there is one screw on the right side just tighten or losen it equally with all four wheels....otherwise u'll experience one side pull of ur car when u apply brakes....n then repeate process reversely add up tyres.....
But i still recommend u to take ur car to specialist otherwise it may harm ur car's stability %26amp; alignment....