Since a full custom ROM is currently unfeasible for most users, you can achieve similar results through these methods: GSpace / GBox: Use these apps from the Huawei AppGallery
The main reason people seek custom ROMs is for Google. Instead of a ROM, use "sandboxed" environments: huawei matepad 104 custom rom cracked
If the "proper paper" you are looking for refers to a screen protector to hold a cracked screen together or provide a better writing surface, these are your best options: Since a full custom ROM is currently unfeasible