Is my PSP unrepairable?

When I put in any game, it says the disk could not be read. So i went to online forums and it said that there is a litte black switch inside and I pushed it down and it broked. It is in the corner if no one knows what im talking about. So now, when I put in a umd and close the cover, it does not show that little loading thing, so i think its broken. So can anyone help? Like can I put it back in myself. If I buy a umd drive, does it come with it? I'm 14 so I really am confused of what to do