For sure, AWS is the best choice for you to start your career as a fresher.
All the AWS Certification Training are best to begin you learning.
You can up skill you career into Cloud Computing domain for freshers.
Amazon is a pioneer in Cloud Computing above rest of the Cloud Vendors like Salesforce, Azure etc.
As they have a huge number of customers related, the number of jobs are more and if you get certified then its a added benefit.
All the best for your career start.