it's a regular issue, the more layers between the actual tool (JVM) the less you will need to master, but at the same time the first thing you'll learn is to forget how to use javac or any compiler and just import projects configs or let tools infer stuff for you.

In my personal case, knowing about classpaths the hard way was my only path to salvation. Otherwise I was blindly tweaking IDEs project configs without any idea what was happening.