Originally Posted by Kindfiend

Good for you learning to work on cars! Take it slow, make sure you do every step, and use a torque wrench to tighten bolts to spec. This will save you a lot of trouble later on, especially if you are like me and wing it half the time.
If there is oil on the pan, I would first look at the front main seal. That's a very common spot for our cars to leak. Fortunately, its easy to replace. If you look on the passenger side of the car, underneath where the belts are, you will see a pulley with two belts attached to it. You have to remove the pulley to get to the seal, but it's a good place to check for leaks.

On a side note, those oil additives are no good in my opinion. Fix the problem, not the symptom. Good luck wrenching!