Welcome @escspencer
Numista is one of a few handy online databases you can use for basic research on any given coin minted.
As to coin cleaning, for non precious metals circulated common coins, usually a gentle soap and water. Rarities, well... you just have to be lucky to find so check first before washing since any polishing action/wear reduces the collectable/numismatic value. As a rule of thumb I don't clean any coins until I'm sure it is nothing really special.Even though #silvergoldstackers are more about precious metal coins, rounds and bars, you are still welcomed to share with us what you have in your collection.
I have a collection of various non-precious metal coins built up from Coin counting and vending machines. It's amazing what could be found in them.