i am trying to change/extend the FAQ module and i am not sure how to start with it, running otrs 3.3.10.

So far i read the official documentation with the corresponding chapters and created the hello world extension. i also read some tutorial i found in the forum.
But i am totally unsure how to start and if it is possible without touching the FAQ original files(?).
Would be glad if someone could point out a good start(howto/docu/addtional Information/code) for changing the FAQ module.
Regards
Jobert