It sounds like you should find some folks that are already doing angel investment and talk to them. I think there are mixed views on the "clubs", but you'll want to find somebody that can take you through the steps and potentially co-invest with you.

You could probably shoot a mail to YC and note interest in upcoming angel events, angels in your area, about demo day and whatnot.

Also, http://www.paulgraham.com/angelinvesting.html