SAP offers a lot of self-service content today to help you educate yourself, prepare for, or start a migration. SAP has launched a Web site that brings all this content together in one place to make it easy to find all this information.
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The link is: https://www.sap.com/products/integration-suite/migration.htmlThis page provides information on SAP’s integration strategy and a way forward with content for everyone from the CIO and enterprise architects, down to your practitioners using your integration technology. SAP provides a migration guide with step-by-step instructions on how to migrate from SAP Process Integration/SAP Process Orchestration to SAP Integration Suite. You can also find detailed blogs, videos, and links to prebuilt content to help dive deeper on specific topics to help with migration.

SAP is also offering a free assessment and planning through the SAP Migration Factory program where SAP will assess your current SAP Process Integration or SAP Process Orchestration environment and develop a migration plan to SAP Integration Suite. This is typically a two to three week engagement. This program also offers assessment and planning for other product scenarios such as older Cloud Integration Technologies like Cloud Platform Integration on Neo moving to SAP Integration Suite on Cloud Foundry and other BTP products like SAP HANA.