So, I imagine that Schwyzerdütsch is your first language in Switzerland.
Geez, even as a native German speaker, I have to REALLY intensively concentrate in order to understand the basic content of conversations in Schwyzerdütsch.
It is in the German part, and there are even different Schwyzerdütsch, Basle is different to Lucerne and If you’re in Berne good luck trying to understand what he says.
Zurich is again a different story however If you’re from basle or Lucerne you can understand it very well.
In Grisons there’s a 4th language, called Romansh, that’s a completely different animal.