Just follow these steps:
First of all you have to create the courses in the portal that will reflect the training.
Then , assuming that you have already added your users, you will move to the the Import-Export option (1) through the admin panel.
Type the data you want to import into the Import description text area (2) and click the Import data button (3).
The fields that you will use are the following:
Usertocourses,Course,EnrolledOnDate,CompletionDate and Status
The field Status can have two values: not_attempted, completed.