Having logged in, you'll arrive at the learner home page, from where users typically access their courses. As administrator, you'll also have access to the Learner->Admin toggle button.
Click the Learner->Admin button from anywhere in the site to be taken to your account admin page. Its from here that you will:
manage your account
manage users
enroll users on courses
view progress metrics
view licenses and purchases
and more
Click the Learner-Admin button again to toggle back to the learner view at any time.