I got asked "How do you tell a damaged coin from a error coin ... ?" My response, "STEP-ONE ! bookmark error websites/pages/forums and learn stereotypical errors to compare to the ones you think you found. this will work for about 90% of all errors and if you just do this you are ahead of the curve by light years. THEN the more difficult ones "is that a post mint damage or a strikethrough ?" for example. that takes looking through 100000000s of coins, referring back to the first step 100000s of times, dealing with people telling you your wrong 10000s of times, then realizing that 99% of the 10% you can not identify really weren't worth anything anyway and that just sticking to step one is enough for the hobby and a lifetime. BUT NOW that leaves you with the 1% of the 1% that may matter to you the most. take your time with your searching, use your tools (loupe,microscope,mat, etc) watch videos of people with like minds to you and you WILL find those gems that have value ✝️"