Namecheap domain transfer from Hostgator to AWS

I'm currently in the process of transferring my site from Hostgator to AWS, and am aiming for zero downtime. He's what I've got so far, please correct me if I am wrong in the process.

AWS Route 53

-Create Hosted Zone with mydomain.com

-Create Record Set with Name: mydomain.com | Type: A - 1Pv4 Address | Alias: Yes, target my Elastic Beanstalk Load Balancer | Routing Policy: Simple

NameCheap

-Copy nameservers from Route 53 into the Manage Domains section and save.

Hosting

-Keep both hosts running for a few more days until propagated, then cancel the old host.

Is there anything I missed? Do I have to do anything with an Elastic IP(which I have for my EC2 Instance), or DNS Zone File (of which I have been recommended to transfer yet have not touched on my old host)?

Thanks for the help!