Sorry you didn't find anything of value, but I am guessing you are getting your ideas of what the hobby really collects from
ebay auctions or click bait youtube videos.
There are more
ebay auctions in one day wrongly calling their coins error coins than the entire number of REAL error coins sold at Heritage Auctions in the last 2 decades! People are not only getting misinformed, but they are being taken for a ride. When trying to re-sell they get the bad news. Some sellers don't know any better, and some are out to milk the misinformed public.
Looking for random anomalies on coins and hoping they match up to something collectable will take you a lot more time, wasted effort, and disappointment repeatedly finding out you have nothing but post mint damage, useless
Machine Doubling,
Die Deterioration, or minor insignificant imperfections (etc.).
Spend some initial time at places like error-ref.com, doubleddie.com, varietyvista.com, conecaonline.org, coppercoins.com etc. to find what actual and collectable coin errors look like.
A good way to start is, for instance, separate a bunch of pennies by date. Go to varietyvista.com and, date by date, use the reference there to see what errors are known for that specific coin/mint mark. Look for those specific errors/varieties using the pictures provided. After doing this for awhile you will KNOW what an actual error looks like and not have to waste time on face value and damaged coins. :)
BTW, looking for coins of value is not going to bring you very much extra money or all the collectors on this forum would be rich. The get rich quick idea is part of the
ebay fed fallacy.