Using a Mac:

System Preferences -> Internet Accounts -> (Maybe you need to click the +) -> Select iCloud on the right -> Create Apple ID -> Follow the steps

Also note that after entering your Birth date, you should select "Get a free iCloud email address..."

Using a Mac:

System Preferences -> Internet Accounts -> (Maybe you need to click the +) -> Select iCloud on the right -> Create Apple ID -> Follow the steps

Also note that after entering your birthday, you should select "Get a free iCloud email address".