AWS management can be done from both commandline and UI. AWS management console is the UI for managing the different services of AWS. In management console, all the configuration options are quiet simple just with few clicks.
AWS also offers commandline utilities to manage the instances, Beanstalk environments, RDS instances, Route53 DNS settings and more.
The commandline tools can be downloaded from the AWS downloads section – http://aws.amazon.com/developertools/351/
Instructions on how to configure those tools successfully on to you local system can be found in readme.txt from the downloaded zip file.
Alestic.com, AWS.typepad.com & AWs developer forums are good resources for updating your knowledge on AWS