Sims 4 Mod Constructor

I got my daughter hooked on Sims during the quarantine and we had a lot of fun. I enjoy making challenges for her and she loves playing them.

But she also likes programming. And since I showed her mods, she really wants to do her own. So I downloaded the Zerbu Mod Constructor so she could start with traits and aspirations. Those would lend themselves best for our story driven gameplay. But I am at a loss. I tried following the tutorial for traits, but I don‘t even find the right menues.

Is there a nice and easy follow along tutorial on youtube? It doesn‘t have to explain all the the details. Just how to make a very easy trait.
9apps.ooo/
Also my daughter doesn‘t speak english. Is there a way to change the language to german? Will the app work when our game is in german or will there be problems?

If it is not appropiate to post here, please help me out where to ask instead. I really want to support my daughter in her modding