I keep getting air bubbles in my MMF when I am rolling it out. Is there anything that I can do to prevent this?

Check your rolling pin for pocks or built up cornstarch (or whatever you choose to roll on)

Let the fondant settle a little more... overnight is best

Don't roll it too thin

Possibly... and this is a stretch... you may not have enough PS in it. Hold it up and watch how it stretchs under it's own weight... if it's stretching fast, you don't have enought PS

are you using enough crisco when mixing