Help beeping noise coming out from computer but not starting

Hi i tried to start my computer but beeping noises came out and it beeps 4 times every time i try to turn it on. It doesn’t start up and stuffs. I read it up and i dont understand anything they are trying say. So uhm could anyone like explain the steps on what to do and stuffs cause i dont understand anything. Note that im just 16 and might have no knowledge about computers whatsoever. Also i am sorry for bothering anyone right now. Helppp.