You need to enjoy the food you are eating and the excercise you are taking if you are to stand a chance of making this a permanent lifestyle change.
For excercise, start using your bike for all your local transport, including shopping, commuting, visiting friends etc. I manage to clock up about 10miles/day of utility riding and I dont have to set aside "training time" for that.

You wont need the high calorie intake of a hard-training racing cyclist or endurance rider . The diet advice to "cyclists" is really meant for athletes, who have a very high physical output, so need a high input of calories.