To get started with CloudWatch Dashboard, you first need to create a new dashboard. You can create multiple dashboards. There is no limit to the number of dashboards in an AWS account. All dashboards are Global, not located in a specific region
Access the AWS Management Console
In the CloudWatch interface
In the Create new dashboard interface
MyFirstDashboard
At the Add Widget prompt, select the Line interface type. In the Add to this dashboard interface
In the Add metric graph interface
Select the host according to Hostname type of the newly created instance
In the CloudWatch metrics interface
In the CloudWatch metrics interface
Continue, in the CloudWatch metrics View
Return to CloudWatch Dashboard interface