Good on you Bath! I think you'll enjoy yourself, the mental stimulation will do you good!
I'm in a similar situation to Leasha - pinching myself! I also got a job that I am really excited about, originally I applied for a different position, the woman who interviewed me must have liked me because she referred my CV to another department, a few weeks later they rang to say they had a position and I should apply. Even though I have no direct experience in this role (as an underwriter) they felt that I could do it and that I was a good fit for the organisation. I just got back from the company conference and I haven't even started yet!
So good luck! I'll be watching to see how you go!