Most of the early weight loss on keto is water and glycogen and not fat, but it typically encourages people to stay on track and you get less blood sugar spikes fucking with hunger. So either try keto or do low carb, with carbs coming pre workout. Raise protein and do resistance training. As you get your newbie gains and drop a bit of fat you'll notice a difference fairly fast. Aim for 28 bmi, as that's where the first increase in risk factors occur for fatties, though body fat is better. If you really are a boomer, then there's no shame on hopping on trt of you need that small boost. It'll increase your life span on average too.