Wordpress Optimization on EC2 Instance?

Hello, I have this server of mine runs WHM/CPanel on AWS EC2 and we just run only single domain on it. The domain is Wordpress based website and consumes API/token on another domain hosted on seperate AWS EC2 instance. The Wordpress database runs on RDS instance to balance the load off the server. The main purpose of this CPanel is only to manage the website (php etc) over Apache. All other services like Exim, Mail, MySQL, DNS are disabled on the WHM. In comming week are we expecting atleast 1500~2000 unique visitors every hour. Could you please help us suggesting what changes we need to do in configuration to accommodate 1500~2000 unique visitors per hour.