Example project to get you started :)
Feel free to copy pom.xml and the full src directory! I hope this will help you to get started much faster than me, when I was a student :)
Import both into your project. It should look like this:
Without doing anything further, you should be able to run the src/main/java/bitte/nutzt/eure/eigenen/modul/namen/MyFirstStartClass.java inside Intellij with a right click on Run:
Now feel free to experiment and create classes, methods, variables... code! Don't forget to change the package name into something useful.