WHAT TO KNOW BEFORE ENROLLING
You will have to subscribe / buy access to Adobe Photoshop via the Adobe homepage yourself. I can recommend the "Photography plan" for US$9.99 / mo. Once subscribed you have access to Adobe Photoshop, CameraRaw, Bridge, and Lightroom via the Adobe Cloud Desktop app.
Those already using Adobe Lightroom in their workflow instead of Bridge/CameraRaw should have no problem learning from the Photoshop for Landscape Photographers course. The editing algorithms of CameraRaw and Lightroom are the same, however, with different interface.
This course has been made over a period of eight months during the first half of 2020. As Adobe regularly update their apps the interface and functions are subject to change. This might provide inconsistencies between the course version of Adobe Photoshop and your version of Adobe Photoshop and lead to minor inconveniences.