Wicking is when moisture is drawn through a fabric, for example if you were to use a fitted nappy on a newborn with a fleece wrap or soaker over the top the moisture can wick onto clothing i.e if used when baby is sitting in a car seat for a while.
Personaly i've always preferred 2 parters on newborns because their poop is very runny so when you have a nappy with a wrap over the top you have two lines of defence.
ETA I've used terries and prefolds on both my babies and found the terries to be the better ones, they fold easier and are more versitile really. I think folding is all down to who's doing it, it takes a little getting used to and whilst i found it perfectly fine my dh would refuse to use them
I'd say that newborns are the best for trying out all kinds of nappies, buy a few different ones that you like the look of so that when the time comes to buy the next size up you will know what works best for you and your baby.