Here is a great resource as the A-Team within Oracle is the top-level technical resources as it relates to GoldenGate. This is a link to many of their published articles. A-Team Index of articles
Oracle GoldenGate Extract Recovery
Oracle GoldenGate Best Practices: Configuring Downstream Integrated Extract
GoldenGate Cloud Service (GGCS) Replication from Amazon RDS Oracle Database to Oracle DBCS