Install it, and then build something.<p>A few things you will want to look at that are different:<p>1. data types are much richer and more useful than in mysql<p>2. transactional DDL means migrations are atomic.<p>3. schemas are what mysql refers to as databases. Remember to set `search_path`.<p>4. roles and grants are somewhat more expressive and work differently than in mysql, but not that differently for the simpler use cases<p>5. database functions ( aka stored procedures ) are awesome as are extension languages.