If you avoid germany and travel from Luxembourg via France to Switzerland you still have your outbound journey left.

You can travel on a maximum of 2 travel days in your country of residence. These days can be used any time during the validity of the pass.

So after my trip, I can continue my trip after a few weeks normally, right? Thank you for your answers.

If it´s with the PassValidity time and you travel just once in your homecountry no problem

Yeah, I have 2 months unlimited trips ticket. And yes, I would come back to my homecountry and then leave after two weeks again.

So I can have a short break in my home country, and then continue the interrail, right?

Just to make it sure that when I'm using that to come back Germany from Switzerland, it's not stop working. I still have my outbound left but I have used my inbound.

The pass won't stop working after you've used one of the inbound/outbound journeys.

Hey, one more question. I have linked one journey now to my pass. Can I add more trips to pass later still?

Or do I have to link all of my journeys before I activate my pass?

You can do whatever you like. The latest moment to add a train is just before you board it.