Hi!
I too, used to wear glasses (still do, but now I wear contacts skiing).
What you want to do is buy a pair of goggles that will fit over your glasses. Here is an example:
http://images.google.com/imgres?imgurl=http://mirror.altrec.com/images/shop/photos/SCO/16533_m.jpg&imgrefurl=http://www.lonelyplanet.com/travel_services/trvl_gear/item/scott_storm_otg_goggle.htm&h=240&w=240&sz=11&hl=en&start=12&um=1&tbnid=d5Jm8BxArtug-M:&tbnh=110&tbnw=110&prev=/images%3Fq%3Dski%2Bgoggles%2Bover%2Bglasses%26svnum%3D10%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DN
Look for the label "OTG", which I can only assume means Over The Glasses.
Alternative:
As a newbie, you will be in ski lessons, going relatively slowly. If it's not too cold out (where are you going skiing?), you likely won't even need goggles. You could just go with your glasses.
Goggles are used mostly to keep snow and wind from your eyes, both of which are problems at high speed. You should really be fine with just your glasses, unless it's really, really cold out.
Then you may not even want to be outside! Hot cocoa in the lodge is the best option then!!