Hi,
for a general introduction you can have a look to Lars Vogel's tutorials:
www.vogella.com/tutorials/eclipse.html
You can then use the AMALTHEA plugins as dependencies and use their classes.
It is up to you what you are doing with them.
For working with it in a simple approach you can check in the provided AMALTHEA help the workflow section, which is available under the Eclipse Help - AMALTHEA Documentation - Developer Guide - Model Workflow.
There is also described how to write a Hello World.
Regards
Daniel