Logging into the dashboard will initially land you on the homepage, with the main navigation on the left-hand side. To learn more about the different options in the main navigation please refer to the following article: Navigating the Dashboard.
The homepage does not contain any of the tools or core functionality that you will commonly use - it is really just a starting point. You will likely do the majority of your work in the Campaigns, Users, Content and Reporting sections.
You can always visit this page to get an idea of how prolific your campaigns have been in terms of total influencers recruited, total content engagements and total posts for the entire channel. Below these numbers you'll also find a chart showing Captured Audience over Time for your latest campaign.