there is this information located on the kaleidoscope (keyboard firmware) github wiki it should take you through intsalling the arduino environment so you can build your own custom firmware. https://github.com/keyboardio/Kaleidoscope/wiki/Keyboardio-Model-01-Introduction
once you have arduino setup you can edit the keymaps here is a wiki page outlining the steps to do that https://github.com/keyboardio/Kaleidoscope/wiki/Edit-A-Keymap
my understanding is that compiling custom firmware is currently the only way to edit keymaps and that a method to do so without compiling and flashing firmware is coming later but I don’t have any idea on the ETA of that.
Remapping keys? there is also this post by @jesse which outlines the process and where he offers to do the firmware changes for you if you don’t want to do it yourself.