I think I’ve been using light pressure

Then you probably have been.

what would a rounded edge feel like while shaving?

It is a very gradual change. It is an edge that feels smooth but is looses its ability to cut well. If the edge feels harsh, and it was not originally that way, then you likely have a breakdown of the edge at the apex. This would look very toothy on one of my microscope photos.

I think I need to start by picking up a finishing stone so that I can try to touch up my own edges.

Another thing you can do is to take some worn, clean denim (cut from an old pair of jeans), stretch it over a 2x4 and apply a light amount of green chromium oxide paste. Then, about every 10 shaves, or so, do 20-30 stropping laps on this “loaded” strop. This will significantly extend the time between honings on your razors.

Though I guess that could help keep you busy! I have no idea what to do if I’m not busy 🤔