Hi and welcome. The only right way is to tune your original file not some file from other same car :) Your original has to be modified, never use another file, you can brick your ecu.
First focus on one ECU type, find the damos for it, try to figure out how the system works and locate basic maps... You will need winols software - also read manual of how to use it...and so on :)
but before of all, read some posts to get some info :thumbup: