I Did That... Kinda!
Just opposite. I shot left handed for 40+ years; then switched to a righty...
Even now when I check out a new rifle without thinking, I grab it as a lefty. Believe it or not after a hunting season, I became every bit as good as a righty. I can shoot a rifle with either & I'm not as good as a lefty with a pistol but can still do it. I tend to think that everyone should train a little in both, because as age grabs us by the seat of the pants, there is no telling which eye will fade first.
I hunt mostly squirrels, so the small targets have helped me get use to it quickly...
You can do it, Good Luck...