Where is the CMS site annual plan for students where I can input my promo code?

I received instructions to follow from webflow but they didn’t work. Basically, there is not section of where I can change to an annual CMS plan and input my promo code that webflow gave me. What’s the problem?

Also, the tutorial right when you start stops at a certain point and you can’t continue it. How do I continue to learn from that tutorial if it just freezes? I tried logging in and out and didn’t work.

Here is my public share link: LINK
(how to access public share link)