Need some advice.

So we have a long weekend this week, so I was planning on starting my dd either on port training (take 2) or breaking the finger-sucking habit at night with that nasty nail polish stuff (her teeth are being affected at this point). Problem is i don’t know which to do. I probably shouldn’t attempt both at the same time but I have no idea which would be better to do first. Anyone have some insight? Tía!!