Hello Zieghewurr95
Have you read this already?
https://community.sbb.ch/d/27200-sbb-half-fare-card-how-to-use/2
May I give you a hint? I notice that you ask quite a few questions here, that’s absolutely fine and that’s the purpose of this platform. When coming to our country, and we are looking forward to it, simply keep in mind that politeness is absolutely key in Switzerland. Whenever you approach someone in person in Switzerland, of whom you need something, it is expected that you greet; otherwise you are considered a rude person and people are less willing to help.
Kind regards,
Roland