As many know, I am a firm believer in Balance when carrying a firearm for EDC. How weight can take a toll on the skeletal/Nervous system. Preached about the importance for years. Usually on death ears.
Here is a interesting video. Take a way's for me was how a shoulder holster was recommended. How many older experienced shooters do better without red dot sights and for me shoulder rotator cuff is making my draw on my strong side difficult. Have already switched to cross draw and Appendix carry. Just painful to draw for drills on the strong side. Also finding the cross draw very fast.
Regardless, Check out the video, you might find something useful. Red Dots may be right for you, but others, a good pair of glasses. Slides, grips, hands. A lot of things to consider.
If you wear a shoulder hoster, you should consider two guns, one on each side. (Balance)
https://www.youtube.com/watch?v=WHyx_a_EJks