I can second with needing help. I'm new as well and was wondering if skate skis can only be used on groomed trails?
I don't want to highjack this thread but looks like we both need help.
combo skis are like you might of guessed a crossover they are good for beginning if you plan of switching between the two. To be able to skate you must be on a groomed for skating trail. Combo boots sometimes have a switch to increase the stiffness for skate skiing. If you plan on skating I would suggest skate skis especially if you do not plan on changing the waxes.