Works with Pro and Pro Advanced, should understand AWS concepts and pricing
FileMaker Cloud does work with FileMaker Pro--you encrypt the database files in FileMaker Cloud. You don't need FileMake Pro Advanced to encrypt them.
If you are not familiar with AWS and cloud deployment, read the FileMaker Cloud Getting Started Guide, which explains the sometimes cryptic (but quick!) stack creation process.
It's a best practice not to leave your instance running when you aren't actively using it, and make sure you understand AWS pricing.