What should I know before learning to soar? (and first post here)

Hey guys,

I've been off usenet for a couple years now. Anyway, I am currently a
CFII that would like to learn how to soar. I've contacted a couple
local clubs for information, which they have been very good to reply
so far! I don't have a whole lot of uninterrupted time right now to
devote towards soaring, especially not until summer arrives. What
should I know before beginning this new adventure? How long and what
did it cost 'you' to get your certificate? As far as advancing to a
glider commercial and CFI, how long does that roughly take? I know I
could get the FARs out and see, but I was hoping for some elaboration
on the typical process. Perhaps it would be better to just wait until
summer? I suppose the thermals would be better, not to mention the
cold is just plain unpleasant! Keep in mind, I have zero soaring
background and I'm located in the midwest. Thanks for your help so far
guys and gals!