Saturn Repair: oil in spark plug well, valve cover gasket, spark plug wires

Question
Yesturday, I changed my spark plug wires and found that the first well had oil full up to the brim.  I changed the other three and left that one and the car is running alot smoother.  However, I have been told 1)I may have a leaking head gasket or 2)a bad valve cover gasket.  It seems to me that the valve cover gasket is more likely.  What do you think and do you think that this a job for only a professional or with a lot of time could this job be done by an at-home mechanic?  Thank you so much for your time.
Ruby

Answer
Hi im not sure where u have oil at? if it is on the top of ht eplug where the socket would go u have a bad valve cover if it is on the electrode inside the engine u most likly have sticky oil rings or bad valve guids ..let me know where your problem is and i will give u a hand to fix it..