When I first learned to play guitar, more than 50 years ago I learned to play a Dm chord so:
Much later I was led to believe that was a Dm7 and that Dm was:
After so long playing my original version I always found that awkward to play.
Today I found out that my original fingering was in fact Dm, right enough, just over F.
You are never too old to learn (just too old to remember!)