Pumped you're excited to try out Marketo Sky Beta! Not sure if you attended the main keynote, but our official messaging is that it will rollout to all customers throughout the month of May. Some customers have already been enabled, but this is happening on an ongoing basis throughout the month.
You can see our welcome guide here: Introducing Marketo Next-Gen UX Beta – Marketo Next-Gen UX Beta Help Center
Awesome! Thanks, Justin.