Hello Samra, although i am personally against piracy here are some suggestions.
-Is this console modded? The fact that your console is not modded would definitely make it harder. You could also try putting in a non-pirated genuine ps2 disk to see if it works.
-Depending on how you pirated your disk, you may need to read the steps of how to use your pirated disk. There might be some extra steps or a workaround to get it to work.
-Your disk might not be formatted correctly, making it impossible to read.
-Your console is non-functional in some other way, probably the disk drive.
-If you just want to play your game consider emulation.
PS; If possible support the creator of the game ;) buy their game on steam or smth. I know that ps2 disks are rare and now collectables so cost a fortune. I get you one last thing if you are up for a challenge to try to install a hardrive in your PlayStation no more dilemmas like this usually.