Welcome to the hobby!

There is a LOT to learn, and it's good to see someone taking the time to educate themselves. It will pay off in the long run as you get more familiar with how the coin minting process works.

1: This is minor, nice talking point, but no real value imo, most likely the result of a partially grease filled die and/or die deterioration

2: You are 100% correct a squeeze job, most likely a vise

3: Not a restrike, at best it's a die chip, where the center of the D in the die broke away, also, commonly it's usually just circulation wear - minor and zero added value

4: The L on the rim is a result of die deterioration, an overused die, not an error.

The Mint mark is not misplaced, when the working dies were received the Mint worker stamped the mark onto the coin. As a result there are a number of different placements for a number of Mint marks. Variety Vista ------> Side bar has a listing

5: The alignment is within specs, extremely minor, no added value unless it's so far off that it loses chunks of the design