My next step was finding exactly how to do it, and that's where nonaKnits entered the scene. In her blog she explains very well how to do all the fingers and how to attach them to the hand. It looks so easy that I'm going to try it right now.
Finally I can say goodbye to mittens and welcome back fingers! Yuppi! Thansk Nona!
p.s.
It's so easy and fast you can't believe it!