Kickstarter doesn't work like that, sorry! I can't pledge and support my own project. I tried :)
You have to set up a Kickstarter account and the pledge goes through Amazon payments at the end of the project, April 26, if the book is funded. And I send you your rewards when the book is done, in July. If I don't reach my goal of $1,200 you will not get charged.
It's not too hard. Even my Dad could do it! :)