Your not a Ditz. But a seeing a small part of the crankshaft is normal/ok. The crank shaft extends through the frond and rear of the engin block. The front being connected to a fan belt pully, the rear to the transmition. It very hard to guess where the leak might be, but if I had to guess I would say the rear main seal. They often leak on high milage engines, mine is now, tend to leak only when running. The rear main seal is a seal that should make an oil tight seal between the engin block/oil pan and the rear part of the crankshaft that goes into the transmition.
But to be sure exactly where the leak is comming from the engine must be cleaned. You can do this at home. Get a few cans of Gunk, Engine Bright, etc. and follow the directions. Once engine is clean of ALL oil. Drive for a couple miles and check for leaks, if no leaks found drive a few more miles and check agian. Keep doing this until you spot the leak. Drive as little as possible because oil can flow in unreal directions very quickly in a moving car. If it leaking at the rear of the crankshaft and dripping off the front of the transmition, its the rear main seal. About $50 in parts and $200-$250 labor.
Hope this helps
'92 YJ, 4.0L, 5 spd, OX Locked front, 4:10 gears, BDS 3.5" lift, reverse shackles, Ford 8.8 Limited-slip rear, York OBA, JB Conversions SYE Kit, CV driveshft, Centerforce II clutch, Big Daddy Step Rock Rails, Skid Row Top Prop, Big Daddy OffRoad Front Bumper, Yokahoma Geolander 32's, Rokmen Riddler differential cover