Reinstall MacOS

Yesterday i decided to reinstall my macbook air 2017 13”. I cleaned my disk in disk utilities as google said, the next step i clicked Reinstall MacOS and it turned out the version which is Sierra, after that i just clicked continue but it popped out on my screen that “THE INSTALLER INFORMATION blah blah blah... DAMAGED”. I searched on Youtube to find out solutions, i tried TERMINAL to change the time etc combining with loads of groups of Command Shift Option P R :v it still didn’t work. I dont know what to do now PLS HELPPPPP. Thx in advance

p/s: for the first time i use combination of COMMAND R it was the Catalina ver but after i decided to try another one, booooom it was back to the older ver which is Sierra :((( i also tried internet recovery but my mac said “apple.com/support -2003F”