Step 1: Open an internet browser and navigate to https://store.steampowered.com/about/.
Or you can click here
Step 2: Click the install button.
Step 3: Once installed, launch Steam and create an account.
Complete the form.
If you don’t want to use your personal email address, you can use your FUSD email to create your steam account.
Check your email for the verification link.
Click on the create my account button.
Once your email has been verified navigate back to the Steam Client.
Complete the sign up by choosing a steam account name and password.
You should now be able to use your account info to login into Steam.