Given where the filter is you can get a fair amount of oil spilled under there just from an oil change. I recently reached in there and cleaned quite a mess from on top of the skid plate. What I would do first is confirm you actually have a leak. Go to the auto parts store or Wally Mart and buy this:
https://www.walmart.com/ip/CRC-5103-...iABEgLdqfD_BwE
It will be way cheaper at Wally Mart. Put the spray tube on and spray the heck out of that whole area. It just dissolves oil, evaporates quickly, and won't hurt anything. Once you have that area cleaned up, look again in a couple days.