@ Carl King
Here is a picture of my guitar neck at the nut. The new nut was 43 mm while the neck is only 38 mm. I started filing back the ends but decided to wait and get advice. The old nut put the strings closer together to get more space at the edge of the neck.
I am at Chap 2, Lesson 5 of the beginner course with Lisa McCormick. I have been trying to get my fingers in condition and accustomed to the new demands. I can now keep the 1st and 6th strings on the fret bars but have not learned to fret the interior strings to get clear tone on all. More practice will clear that up I think.
Try to stay sane. It's Important!
My other solitary mind exercise - Sense & Nonsense