Hovercraft not moving at all
I have several ideas about your design:

1) The battery is indeed not good enough. Those 9V batteries are not made to supply 'relatively large' currents, like your motor will ask. So you need a better battery.

2) The skirt needs to be shaped differently indeed. The idea is that the air is 'held' underneath the hovercraft. The paper sheet would act like a barrier, that 'prevents' the air from escaping the bottom. So the skirt needs to be around the edges of the hovercraft, not covering like you did.

3) I don't know if your motor will be strong enough to lift the entire thing, including the (heavier) battery. But because the rest is pretty light, you can try. If you redesign the skirt, it might work.

4) There is no air intake at all. There must be a way to suck air in from the top. The 'circle' you used should be mostly open to allow air in.

Good luck!