Well…I have PostgreSQL 11.1 up and running. I will create new tablespaces and new databases and will fully test PostgreSQL soon enough.
Also, I downloaded SQL Workbench/J (since pgAdmin is currently unavailable for Haiku)–it is not pretty–but is fully functional so far. Once I start really working the DBs, I will test what works and what does not.
Thank you for your assistance!! Have fun everyone!!