Tacking on Tumblr: Create a Tumblr blog
Go to Tumblr and click on Sign Up button at the top right hand corner of the page. Fill in your email, password and username. When you are done, click the blue Sign up button.
You will be directed to the next step which ask for your age and agreement to the Terms and Conditions. Click the blue Next button, and you will be directed to the verification page to verify that you are not a robot.
And there, you are done! Log in to the email address you signed up with to verify your account and you can start posting!