I do not blame you if your motivation to fix your health is weight loss. Most of us started that way. We felt overweight; our clothes would not fit, or often it would even be hard to find clothes. At times someone may have even called you fat or fatty. Recently the CEO of Evernote was in the news for having lost a lot of weight through fasting. Weight though is symptomatic much like an elevated temperature. You do not want it to be high, but in reality, it is telling you that something else is wrong. Excessive weight is invariably accompanied with poor biomarkers for health such as sugar, cholesterol, waist size, snoring and inability to breathe. More likely than not, no one would mistake you for being athletic.
Weight is, therefore, a good starting point and if this is what gets you started, great news. However, limiting yourself only to weight loss without an understanding of the physiology of your body and the need for a balanced nutrition can be dangerous. Weight in itself does not have an equivalence to good health. Clearly, a starving human is not in good health. You could be missing Vitamin D (which is best sourced from being in the sun) or selenium or copper or Vitamin B12. Long term, this can have debilitating effects on your body. Except for the fact that the symptoms of these take years to manifest and often are not understood. You might not relate the pain in your joints to malnutrition or inflammation.
Losing weight remains an excellent motivation for initiating your journey to good health. However, good health is more holistic and is seeking a balance of a healthy stress-free mind, adequate sleep and complete nutrition.If you can have all of that and be your ideal weight, kudos to you, it is not easy to achieve.