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In a word, you don't. The whole idea with deploying a fully-managed service is that you don't have to worry about the operational side of things -- leave it to the experts! :)

As an analogy, think about your company using a mail service like Gmail. Users at your company send and receive emails using the service and Google manages the infrastructure. By choosing a mail service, your IT department doesn't have to worry about installing mail software, managing mail servers, backups, etc -- all you care about is that you can send and receive emails.

A fully-managed DB service operates in exactly the same way. You don't need to worry about knowing how to build and maintain a cluster, perform backups, patch servers, etc. All you should care about is whether your application(s) can read and write from/to the database.

We recommend that you monitor your app instead to make sure users can access all the functionality and that the app is operational. If you discover that there is an issue with your app connecting to the database then that's the time you should take action like logging a support ticket.

I would really recommend you take us up on our offer to have one of our architects contact you directly so you can discuss your requirements and ask your questions. It's free and there's no obligation. Let me know either way. Cheers!