Help me out with setting a prefix and creating a new section.

Hello!

In system settings search for:

Prefix for schemas and package name

SchemaNamePrefix

More detailed information about new section creation can be found in this article: https://academy.creatio.com/docs/8.x/dev/development-on-creatio-platform/getting-started/first-app/develop-application/create-a-new-section

Another article, that can be useful for you is how to create the custom package:

https://academy.creatio.com/docs/8.x/dev/development-on-creatio-platform/development-tools/packages/create-a-package

Thank you for being an active part of the Creatio community!