Total cholesterol 203; Trig 48; HDL 71; LDL 122. A1c 5.3. Are my numbers healthy? 51 yrs 121 lbs. No known health problems. Health anxieties....

Health Anxieties . It looks like your numbers would be OK if you do not have any underlying health conditions. You might want to work on getting your total cholesterol lower than 200 although the HDL in 71 is quite healthy. .
Numbers are fine. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, none of the values you provided are a cause for concern. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.