WarNickel's advice to get the Red Book
is very good. A small investment for a vast amount of information on US coins. Also, just post any questions you may have in the appropriate section of the forum and someone will be along shortly to offer their advice and opinions.
From the Glossary, also in the left column, an answer to your 2nd ?.
The term applied to coins, usually Proofs and prooflike coins, that have deeply frosted devices and lettering that contrast with the fields - often called "black and white" cameos. Specifically applied to those 1950 and later Proofs that meet deep cameo standards (DCAM).
And by the way, there is no real cure for the fever.