Background: I have been paid for IT work for 20+ years - mostly as a Consultant or SME (subject matter expert). I am responding to you because I learned to ask

Background: I have been paid for IT work for 20+ years - mostly as a Consultant or SME (subject matter expert). I am responding to you because I learned to ask the right questions and how to communicate effectively. Now, I may or may not have more experience than you - but if I can speak longer, without flinching, and answer you - correctly or with successful deflection - I am confident you will believe I am the expert. I chose Postgres for my last production application because I did not know it. I knew mysql and sqlite and if I recall it was the only thing offered by whatever PaaS I was using. A file is a file. A database is a database. A punch is a punch. Grab three Postgres books. Read one of them cover to cover. Start the second. Skip everything you know from the first book. Start the third book. Double study everything that is contradicted between the three books. Congratulations. You will be an expert according to those three authors.