There's a YouTube video showing how the airbag comes off, the guy seems frustrated and takes a while and he finally "decides" to just u do one side and kind of push it off the other. This is actually the proper way, he just didn't know it.
There's one bolt under the bag holding the wheel on. This bolt is a one time use fastener and intended to be discarded. Get one before you do the swap, to the OP, pick one up and replace yours.