Get away from social media like facebook and
ebay if you want to know the actual coin hobby. There is so very much wrong info out there b/c well meaning but non-informed people like to post so much.
ebay also has a LOT of shysters on it.
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, get a box of penny rolls from the bank and separate the coins by date and mint mark. 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. :)