I have personally never developed much but what would be needed to start developing for the xa1 ultra? I want to start a repository. Of information and files so that we can start development for this device.
I bought the Sony Xperia XA1, and noticed that since it's a relatively new phone there is no TWRP available for it, but I'd like to learn how to create a TWRP for the XA1. Where do I begin?