would this work or brick my 360 ?

https://xboxjtag.com/xbox-360-jtag/

i saw this on the internet but i have never tried to flash or mod my 360 before ever at all and this seems pretty simple to do .......of course i would buy a used 360 to do it on and not use my real one cause my xbox one x has the same gamertag and i dont want it to get banned

i would only do this so i can trade in all my old 360 games at gamestop would it even be worth it or can microsoft ban my IP and not the 360 console and just the gamertag i would make for it thanks in advance

or if that article would just brick my 360 let me know and i wont even try it