I need to update a MacBook Pro 2016 to Sonoma or Sequioa. Please Help

For work-related reasons I need this older computer to run MacOS 14 or newer. I followed the usual steps for OpenCore and it was going well but I ran into an error when I tried to save to my external drive. When I tried to look up the issue I mostly found that I need a different version of the software made for older devices, but I can't find it. How should I Approach this?

Author: @Local_Pickle_4717