How to best migrate to AWS from a live dedicated server at Ntirety.com but which registrar is different?

My very first question to this forum. I hope it will make sense. I am basically migrating to AWS a live site. Here are the details:

1. Domain name: absoluteserv.com
2. The server is hosted at Ntirety.com (formerly Hostway) via a dedicated Windows server. Contains a basic website, FTP, and email server.
3. The registrar is droa.com (registered more than two decades ago :D) but the Name Server and DNS records are with Ntirety.
4. Constraint: Need to migrate over a weekend so as not to heavily affect production. The target date is July 2-4, 2022.
5. I already have set up an AWS server (EC2AMAZ-3DR5VC8) and have copied the files from the original server, but will obviously need to update at the time of the migration.

Could somebody give me an idea of how best to do this?

I will probably be getting assistance from an AWS Expert but would appreciate it if I will have an idea of what needs to be done.

Thanks, Danny