This job isn't really for freshers.
The type of people required for this job are supposed to have a 3+ years of experience and also must be well familiar with the different ins and outs of AWS. They must be familiar with how to play with data in order to reduce the price and also make it efficient. So, overall this job isn't really for freshers. If you are not a fresher and planning for the job role, I would recommend you go for the AWS Data Engineer Certification first and become certified.