Exercise at least 3 or 4 times a week for at least 30-40 minutes or more. Thirty to forty minutes of aerobic exercise several times a week is ideal, combined with toning or strength training at least a couple times a week. If you are starting out very overweight, however, this may seem unreasonable or impossible. Walk as fast as your body will allow without severe discomfort. Or try a water aerobics class, which will greatly reduce the strain on your body caused by the excess weight and take the stress off your joints.
Overweight people are usually overly focused on losing weight and understandably so.
If you concern yourself with good self-care, specifically eating for health and exercising regularly, eventually your weight will reflect that. People who eat healthy and exercise are not fat or do not stay fat. Start with what you know, and go from there. Nutritional self-education is a key element, as is spiritual education, because strength to implement what is learned is spiritually acquired and maintained. I guarantee you ll have much better and longer-lasting results.