Yes, I do have a subscription and I think I'm entitled to or allowed to install ArcGIS Pro; however, I cannot proceed the steps below because my account is public.
To activate Pro extensions and Online apps:
1. Sign into ArcGIS.com.
2. At the top of the page, click Organization > Members > (more options) > Manage add-on licenses in the dropdown.
3. Select all extensions or apps to activate > Save.
Thank you for your assistance.