Hover over the "Reports" dropdown menu and click "Reporting"

Click [Create/Edit Report]

• Choose Report: Orders
  
• By: Year or Month
  
• Click "Advanced Options"
  
• Column Name can be set to many values. Two good values are "Orders_Count" (use Format: Number), or "PaymentAmount" (use Format: Currency)
  
• (basically, experiment with all of these options to see which reports are useful to you)
  
• You can save a report setup by giving it a name in the "Set report name to:" field and also enabling [x] Available to all admins
  
• For example, save a report that gives you order counts and save another report that gives you payment amount totals.
  
• Click [Generate] to actually generate each report