The process of enrolling in a Learning Path is easy!
In the left navigation, make sure you are in the Learner Workspace.
When in the Learner Workspace, select Training and then Catalog. This gives you an overview of all available training that you can enroll in.
Select Learning Paths in the top menu to focus solely on the available learning paths.
To enroll in the Learning Path, select the Learning Path you want to enroll in and click on it to be send to its page. Click on the purple Enroll button to enroll.
You will then be led through the Learning Path.
Read more: Navigating the Learning Paths Listings Page