'99 Chevy Lumina smoking

OK… I know next to nothing about cars. I have a '99 Chevy Lumina I just bought in February. It has been one problem after another. The water pump has been changed and I just got my car back on Monday because there was a leak on the timing chain cover. Now, the car is smoking on the passenger side. Its not a light smoke, but its not heavy yet. I noticed it on the way to work this morning. I opened the hood, it is coming from the left side (looking at it, so the passenger side) of the engine maybe kinda underneath it. I dunno what to do, but I’m ready to push that thing into a lake. Any ideas?

With a flashlight and a mirror and wearing old clothes, find the source of the smoke. Oil dripping on an exhaust manifold is common.