If you want answers to questions, you've not thought of yet, you might check out this link of 12 pages of links that answer with details on coins.
CoopHome: Note it turned blue? Click on that and you will begin your coin education, one topic at a time. (these are threads I started, or added more information like I did on this thread. See something you enjoy, comment and others can read/reread this information again/for the first time.
Enjoy