Creating an Account with AWS
Creating a VPC
Creating a Security Group & SSH Key Pair
Building an EC2 instance in AWS Cloud
Connecting to an EC2 Instance
Downloading Oracle Database 12c Software
Preparing EC2 instance for Oracle Database 12c installation
Changing Hostname of an EC2 Instance.
Adding Secondary IP (for oracle installation we need static IP)
Creating Private DNS Hosted Zone
Configuring SELinux and Firewall
Adding a Volume to an EC2 Instance
Taking a snapshot of an EC2 Instance
Adding a Swap Volume
Oracle Database 12c Installation
All the above details are demonstrated in this document :
Shanoj 
Thank You So Much! Very clear and well explained.
Many thanks for your feedback!
Super Doc Shanoj
It’s very Very informative and good documentation.
Many thanks Gopal for your feedback !