Wo schneide ich meine hübschen Schildkrötenblätter?

I think you need to get the leaves right from where they connect with the stem (so you can’t use any that have broken off)

Those arent begonia leaves that wont work.

That is a primulina. Can be prop like African Violets.Stick the cutting in slightly moist soil in small 2 inch pot. Here is where you cut- red lines. Blue x mark side is what goes to soil. Hope this helps😊

https://preview.redd.it/f00lsydj88wd1.jpeg?width=1440&format=pjpg&auto=webp&s=c01302c5b042ed6566f58dde203c673a8bd866cd