No oil draining out during oil change

[LateBloomer]

Hi there,

I'm working on my first Volvo. I'm very much a novice mechanic. This is my first time changing oil on a car myself ever. I have a 1984 760 GLE D24T. It has mostly sat for the last several years with the previous owner. I am trying to change the oil.

I removed the oil plug and nothing came out. I read that you are supposed to let the engine warm up first, however as this is one of the first tasks that I am doing on the vehicle, and the temperature gauge is not working... I am hesitant to let the engine run.

I'll try to change the oil filter first and see if that helps but any advice would be appreciated.

Maybe it's out of oil? Or maybe the oil has geled up somehow? Things I read online...