Within Teamwork Desk you can subscribe to a Desk focused webinar directly from your account.
To sign up, click on your profile icon to the right of the Desk navigation bar and choose 'Webinar Signup':
A new tab will open in your browser where you can choose the webinar you wish to attend.
You can choose to show what time the Webinars take place in your own time zone by choosing 'Show in my time zone' and selecting you own. You can then enter your name and email address and select 'Register'.
Once registered you will be provided with further webinar info:
You will also receive a webinar sign up confirmation email.
For more information see: Desk Getting Started Helpdocs