MacBook Air shut down suddenly and won't turn back on

My laptop was working at 11.30 this morning perfectly fine with 16% battery. I went to put it on charge on a plug I have used before with no issues. Came back to it at 1.30 and the whole thing is completely dead. No ‘charge battery’ image coming up on the screen, the power cord isn’t lighting up green or orange (tried it on another laptop and it worked fine, tried a different power cord that I checked works and no lights), no dings or beeps or whines.

I have tried all of the Shift+Fn+Ctrl+Cmd and power button combinations that have been said before, but none are working.

I am hesitant to open up the back as I have no proper knowledge of the inner workings of a computer and don’t want to damage it further.