Okay, You want to know how to add YouTube Vanced to a Kindle Fire device? Here's what you'll need to install. (if you're doing this on regular YT, you'll need to skip the MicroG part because that's not really important for normal YT)

1. Install Google Services Framework (each version depends on a version of Fire OS you're using)
(https://www.apkmirror.com/apk/google-inc/google-services-framework/)

2. Install Google Account Manager
(https://www.apkmirror.com/apk/google-inc/google-account-manager/)

3. Install Google Play Services (Also depends on a version of Fire OS you're using)
(https://www.apkmirror.com/apk/google-inc/google-play-services/)

4. Install MicroG
(https://vanced.app/APKs?type=NONROOT)