2002 Lincoln Cent Error?

"so many error coins out there" - I guess that matters what you are calling an error. In general the number of errors released from the mint has gone down dramatically in recent years. This does not include die polishing, clashes, die scratches, die cracks, and mint die chips, none of which are really errors.

Your coin is a normal 2002 cent.

You did leave a clue that you are headed in the right direction in your searching. Any time you find something you think is odd, best thing to do is get a number of other examples of the same issue and look at them as well for comparison. The only way you will know that you are looking at something normal is to learn what normal looks like, and that's through experience of seeing hundreds of examples of 'normal' for each issue. A lot of the questions asked here could be alleviated if everyone followed that simple common sense advice.

My best advice to you and to the other newer coin searchers out there is to grab a container to put the 'oddities' into as you search, go through 5,000-10,000 coins looking for them, pull out anything questionable, then whe you're finished with that batch of coins go back and look through the oddities again. You'll weed out over half of the oddities pile if you paid attention to what you were seeing the first time through. The oddities that are left - ask questions about them. When you get the answers, annotate what the answers were and keep the coins. Use them to continue your search in another 10,000 coins.

10,000 cents is $100 face. At four rolls per day it would take you 50 days to complete searching through that much. I generally handle up to 10 rolls per day, and it takes me about an hour to go through that quantity. I can generally make it through a $50 bag in two weeks, and I don't miss much. Then again, I've been doing this for over 20 years too...but that's how you get experience, and that's how you learn to know what you're looking at. Asking questions about every odd coin here then tossing them back in change when you get the 'normal' or 'not an error' response isn't going to help you at all.

Just some words of wisdom to you and others here who read this and are just getting started.