Many ancient-coin educational web sites have links to other educational sites. However, usually many of the links are broken. Some sites have moved to new servers. Some disappear altogether. I have tried to keep my page of links up-to-date and yesterday I put a lot of time into it. I checked the links to see that they were working, fixed what needed fixing and deleted what needed deleting. I even added a few. Here is the annotated list of links: http://augustuscoins.com/ed/sitelinks.html The list is not intended to be exhaustive. It is intended to help beginners and, in addition, have so many links to more-sophisticated sites that anyone interested in ancient coins will discover some interesting and useful sites about ancient coins. I recommend you bookmark that page and visit it when you have lots of time to spend looking around the web. If you find any broken links, drop me a PM.
I don't envy you trying to keep that page current. It's a great resource, and I appreciate the work you've put into it.
Great resource, Warren. tesorillo.com would be a good addition. That site helped me tons when I was first trying to identify late Romans
It was on there as: An amazing and beautiful site for identifying late Roman AE coins: Late Roman Bronze -- Book on line. But maybe it was in the wrong section, so I put it in a second time, once under identifying coins and once under collecting themes, late Roman coins.
@physics-fan3.14 this thread the OP has resource links that will answer many questions for you. Warren has gathered a wealth of resources on ancients and their history etc....