To signup on gmail.com write www.gmail.com on address bar.
Let the page be opened. There is a link on the below of the page on which sign up for gmail is written,
Click on it.
A form will open for gmail account.
Fill up this form as you filled up your mail.yahoo.com account form.
And click on submit button.
When you get your email address through gmail then open blogger.com in new window.
