Everyone has different reasons why they decide to lose weight and protecting yourself from heart disease is a very good reason. Getting and keeping to a healthy weight also reduces your risk of other health problems like diabetes, some cancers and arthritis.
To lose weight, you need to use up more energy (calories) than your body takes in from food and drink. Ideally you should combine taking in fewer calories from food and drink, and using more calories by getting more active. Most people find that this achieves the best results.
You may prefer to start off with changes to what you eat and think about physical activity later. For physical activity to greatly reduce the risk of heart disease you need to aim for 30 minutes of moderate activity a day, at least five times a week. Moderate activity is any activity that leaves you warm and breathing more heavily, but still able to hold a conversation with someone. Once you are used to this, continue to build up the amount you do in order to help with your weight loss. If this sounds impossible for you just now, remember that doing anything more than you do now is a step in the right direction and will certainly help.
Please remember, however much you change your eating and physical activity patterns, a weight loss of one pound (1/2 kilo) a week is all you should expect. Losing weight too quickly may not be good for you.
Another tip is to try not to base your success on weight alone. Instead, focus on the changes you are making to your eating and physical activity. Base your goals on these and reward yourself when you achieve them.