For the leak - Go to your local auto parts store and pick up a small bottle of tracerline Dye-Lite leak detector dye for oils, and you can probably pick up or borrow a small U.V. LED Flashlight (Whole kit can be had on Amazon for relatively cheap) - Just make sure you dont shine that UV light in anybody's eyes (they come with Amber safety glasses to block U.V. glare)
The dye will show up under ultraviolet - if you can get natural sunlight to shine on the leak area, you can spot it without the light, too.
Just be careful not to spill any and try not to get it on your hands, or you glow in sunlight

It can be difficult to completely clean off, hence the advice to not spill anything.
Pour a little bit (1/8 ounce) in your engine oil filler and run the engine a couple hours til you notice oil leaking and then use the U.V. light to trace the leak back to its source.
Chances are quite good that you have a loose engine sump to crankcase bolt.. It is not uncommon.

(if that is the case, it will only get worse til you pull the engine and replace the base gasket, blue loctite on the bolts and torque it down to specs.)
How poor are they who have not patience. What wound did ever heal, but by degrees? - Iago (Othello Act II, Scene 3)