Questions from a first timer!

Hey guys,

I just got my first sofle split keyboard from AliExpress and its amazing but i have a lot off questions: 1. I bought the prebuilt version without screens, is it possible solder the screens now? How hard is it for a complete noob? 2. Is there a way to map the scroll wheel on the rotating nob while working on a Mac (zmk)? 3. Has anyone designed a travel case for the sofle? 4. What is the correct way of turning off the keyboard? The instructions are all in broken English so I don't quite understand what I should do. They say I shouldn't use the on/off switch but instead use the soft shutdown or whatever. 5. Is it possible to send a character like { instead of the corresponding key?

Thanks!