Moving to Postgresql database

If some teams are well versed with the Oracle database architecture and its optimizers working and designing applications on top of this. Now moving same team to work on AWS aurora postgresql databases design/development projects. Is any key design/architectural changes should the app development team or the database design team, should really aware about, so as to take right decision on any new development project in AWS aurora postgresql database?
Or
Is there any list of differences(as compared to Oracle database) in key concepts like for example basic design concepts, Normalization, Partitioning, clustering, backup and recovery, Indexing strategy, isolation level, performance which one should definitely be aware of?