I smoked as a teen but quit at age 23, i am now 61 and i worry all the time about lung cancer.... is it a good idea to get screened? am i at a high risk?

Lung cancer risk in smokers declines by 40% by 5 years they stop smoking. The risk never declines to that of non-smokers, but after nearly 40 years your risk is very low. Discuss with your doctor. This website can help you evaluate your statistical risk: https://www.oncolink.org/risk-and-prevention/smoking-tobacco-and-cancer/former-smokers-and-cancer-risk