@eleos it would be interesting if you could start a food diary to track the foods you each at each meal and when you experience indigestion. Gluten, sometimes dairy are common offenders. If you can identify the food that's causing the problem, try eliminating it for 30 days and document how you feel, then reintroduce the food and document how you feel. If you feel better without the food, then worse with the food, you probably have a food sensitivity to that food.
In general, you need to eat either a high carb and low fat diet, or a low carb and high fat diet. (Protein is the same across all diets).
If you eat both high carb and high fat, you'll overwhelm your body with too many calories.
If you eat low carb and low or no fat, you'll starve with not enough calories.
Also, and this is important, if your protein intake is in excess of what your body needs at any meal, it will be converted to glucose. Not what you want.
However you eat, eating lots of whole healthy foods - (meat, poultry, fish, seafood, eggs, and nuts, vegetables, and healthy fats, with smaller amounts of whole grains, starchy root vegetables, legumes, and fruit and few or no processed foods works well for most of us.
With a fasting glucose level of 100+, you've crossed over or are close to crossing over into pre-diabetes. It's good that you recognize that you need to make changes to how you're eating.