Salesforce ecosystem is huge. They offer online instructor courses https://trailhead.salesforce.com/en/academy. I have used mulesoft which is expensive clunky and really a Java shell. My favorite tool is forceamp DBAMP which excels at replicating SF to a SQL server instance and bulk operations/updates to SF. Perhaps the easiest integration is Heroku Salesforce Connect that auto syncs SF with a heroku postgressql DB. https://devcenter.heroku.com/articles/heroku-connect