Whether you need to launch a free or paid video game that is related to Steam, you need to have your personal Steam account.
Follow this link
Fill out the form and click on "Continue"
Verify your email address
Proceed with creating the password and name for your Steam account and click on "Done"
Note that if you want the webpage and its content to be translated into a different language, you can click on "language" as shown in the screenshot below.