Do I have to pronounce the ch in chleb as a k or like a german ch, i mean the harsh one? I am confused because the woman sais it in a weird way
The woman sounds like a devil here. You pronounce it like a german "ch" in "Nacht". https://upload.wikimedia.org/wikipedia/commons/0/0f/Voiceless_velar_fricative.ogg
As you see, there's no difference in pronunciation between "ch" and "h".
In polish ch and h are the same letter. In pronunciacion also is no diffrence. There are some rules when you have to use ch and when h, but even polish children have many problems with them.