Any advice that we give is based on the information you have given us. You should always follow advice you have been given by a health professional.
As you have a long term health problem and your weight is already at a level where it is a risk to your health it is important that you take action.
Although you have not tried seriously to lose weight in the past you may find that you need more help than this website can give. Follow this link to sources of advice and support or speak to your GP or practice nurse or specialist nurse.