As you can see, Microsoft provides a lot of information about how Office 365 products are being leveraged within your tenant. It's up to you as the administrator of your tenant to interpret this information and use it to further your organization's goals.
The first barrier to overcome is knowing what options are available to you. The next steps are keeping an open mind, using your creativity, and remembering to consistently set aside time to check in at regular intervals, all while striving to understand the kind of questions to which your users or managers will seek answers.
Congratulations on having come this far. With knowledge about what Office 365 Usage Reporting can and cannot tell you and other options available to gain insights, you should be well prepared for what lies ahead.