My red nerve fittonia doesn't have its round large leaves and its pinkish color. Instead, it has small wavy edged leaves with red nerves???
The plant seems quite varied in form and colour, so that sounds possible. The smaller leaved ones are supposed to be easier to grow. Can you post a photo?
Sure! Just wait a little. I have known that it requires high humidity which means its suitable for terrariums. I've been keeping them in a small japanese pot. It was placed on top of a tray filled with pebbles and little water to increase humidity. After some time it suddenly increase leaf size! maybe it just need a little humidity.