Creating a EMR cluster is just a matter of few clicks, all you need to know is what are your requirement and are you going to do it manually.
Here is the process of creating an EMR Cluster:-
Step 1: Navigate to the Analytics section and click on "EMR".
Step 2: Navigate to Clusters and select Create Cluster.
Step 3: Give the name of the cluster, the location in S3 where you want to store the log file, the applications you want to install, instance type, Key pair and the roles and Click on Create Cluster.
Step 4: Your cluster will be created in 3-5 mins and now you can use it for your analysis.
Hope you find it useful.