1983 D Lincoln Memorial

Hard to tell from your pix because not true color and glare. By having few bag marks, and luster would say in AU55-58 range. Remember Johnny, the minute it hits circulation it will be less than MS-60, MS being "mint state". Any ding/discoloration anywhere on the coin knocks it down. Nice find for 30 years old!

See that bluish-gray spot to the east of the D mintmark? That's the zinc under the thin copper layer. This is where the zinc rot starts!

I disagree. A coin pulled from circulation could still be MS if it did not circulate long enough to show any wear. For example, if I took an uncirculated coin and rubbed my fingers on it once or twice, I highly doubt any wear would be visible. It would still grade MS. Of course, other opinions may differ. A thread to be read on this topic can found here.

Now, onto the coin posted. I am not sure what is going on with Lincoln's clothes—I want to say wear, but the rest of the coin does not show it that much. Without that bottom part of the bust, I think I am seeing some slight wear in the hair, so I would be at AU-58. But I am not sure what it would be with that bottom of the bust.

I can see a bit of wear over the ear, AU-58

johnnymac52 if you attempting to learn how to grade, LMC's are probably not the best place to start. they are more difficult than LWC's and unless they are an error or rare variety they virtually have no value. I would start with wheat cents and go to https://www.PCGS.com/Photograde/ to learn the differences.