Just a couple of comments.
I map read when VFR and if I am off track I correct based on physical features identifiable on the map. ( Oh, I also use GPS )
I do not recall ever flying any trip of any length where the wind remained constant in direction and or velocity.
Also I am barely literate and attempting to do such complicated math would completely overwhelm my capabilities and I would get lost for sure.
The best advise I can give is when VFR keep it simple and enjoy your flight without cluttering up your mind with needless garbage.
And Merry Christmas to all, even those of you who are lost...
Chuck