I usually remove the focus lock from the shutter button and put it on the * button on the back of my Canon bodies. I don't have an R50 so I can't tell you how to do it exactly on that model. This allows you to get focus, and then lock it in and recompose the shot without having to worry about the camera "deciding" that you want something else to be the focal point when you press on the shutter button. Just my quick opinion and there's a ton more to focus settings, but that's always been the first thing I adjust on my Canons.