Get up early and go for a walk fasted, as the days go by walk farther, you will be amazed at how you can increase mileage. Get a grip on your diet, the less processed food the better. Keep an eye on carbs, use them to fuel your workout, as muscle mass increases it will boost your metabolism. Try smaller more frequent portions. TRT will definetly help if your low. Guidlines say between 250 to 900. The closer to the higher level the better. Get that heart rate up every day, dont weigh yourself every day, tightening up that belt a notch every month will give you more positive reinforcment than numbers on the scale. Your on the right track, dont get discouraged just keep making the right dietary choices.
Bloodwork will give you a glimpse into how your body is reacting, adjust accordingly