The U.S. National Archives has an amazing website. It’s huge. It has tons of information, with and a section created for genealogists. It is surprisingly well organized for such a complex site, but even so, it can be difficult to find all the information of interest to the genealogical researchers.
There is a blog/website called The Twelve Key that can help keep you informed about material and events at the National Archives of special interest to genealogists. It won’t substitute for the NARA pages, but it is a nice complement. I suggest you explore the site to see if you might want to subscribe to it. (free).