As other said, you will find a lot of the information you need in the tutorials, but you’ll also need to do lots of research through other sources, depending on what type of interactions you are looking for of course.
In general the steps you need to follow:
- Establish Basic Game State, JME makes this very easy.
- Import Models, this is your room, and the things within it, that you want to interact with
- register collision with a ray created between a base point(usually your cam coordinates) and your cursor position, this is referred to as mouse picking or ray casting in the JME tutorials and is covered nicely.
- interact with the object that is picked in step 3