Minor fixes and enhancements

Author: seaxwi

content/About Arduino/My Arduino Account/Create-an-Arduino-account.md

@@ -11,7 +11,7 @@ An Arduino account gives you full access to all Arduino websites, apps, and serv
 In this article:
 
 - [Sign up with email](#email)
-- [Sign up with your Google, GitHub, or Apple account)](#sso)
+- [Sign up with your Google, GitHub, or Apple account](#sso)
 - [Next steps](#next-steps)
 
 ---
@@ -28,6 +28,7 @@ Follow these steps:
 
    - _Email_
    - _Password_
+   - _Username_
 
 1. Confirm that you've read the _Privacy Policy_ and accept the _Terms of Service_.
 
@@ -60,7 +61,11 @@ Follow these steps:
 
 1. Follow the instructions to authenticate with the SSO provider.
 
-1. Select a username and approve the required  click **Create Account**.
+1. Select a username.
+
+1. Confirm that you've read the _Privacy Policy_ and accept the _Terms of Service_.
+
+1. Click **Create Account** to complete the account registration.
 
 ---