I guess what all that means is you've got way to complicated pattern for a beginner. So I'll try to answer your questions, but I don't know if I can make it clear just with words. It would really help if you could find someone to show you in person.
1) nap . some fabrics have a fuzzy surface that if you rub it one way it will feel smooth, but the other way rough, Kinda like petting a cat.
2) fusible interfacing is interfacing that fuses to the back of the fabric when you iron it.interfacing is stuff that makes parts of the garment stiff, like collars etc.
3)tailor tacks, not sure exactly, i don't use them, but somehow they are used to hold pieces together, like pins.
4) Darts. this is a thing where you pinch up the fabric in a triangular shape, like to fit the skirt around your hips. You take for example an inch at the top to nothing six inches down or watever, and sew it that way. sorry i dont know how to describe it better.
5)notch at certain places around the pattern pieces are little tabs or notches that are used to align the different parts with each other. or you may need to cut little notches along a seam allowance to let a curved piece lay good. like the top of a sleeve.