Hi,
It isn't uncommon for oil to be around a spark plug. What happens most times is a leak from the valve cover which allows a small amount of oil to leak past the gasket into the spark plug well. As long and there wasn't a puddle of oil, it's not a big concern.
As far as the spark plugs, here is a link you may find helpful when replacing them:
https://www.2carpros.com/articles/how-to-change-spark-plugs
The attachments below are the directions specific to your vehicle for replacement.
I hope this helps. Let me know if you have other questions.
Take care,
Joe
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Monday, July 26th, 2021 AT 8:27 PM