I second 'Just-Do- it', and Hoops The USNA Museum is a nice place to spend an hour or two. Much better if you have an USN event/s or person/s that you have an interest in. If you have time a book like 'Six Frigates', 'Dawn like Thunder', 'Shattered Sword', 'Neptunes Inferno','Last Stand of the Tin Can Sailor', Etc.. Will add some feeling for the role the USNA has played in US/World History. If you don't have that kinda time, I like this site
https://www.history.navy.mil/browse-by-topic/ships/ships-of-sail/uss-constitution-Americas-ship-of-state.html or just google for some vids on Midway, Guadalcanal, War of 1812 , etc., -----Spend 2 hrs on background of the place and it will be more fun to be there. I mean unless you know what a Long Lance torpedo is and why the USNA thought it worthy of preserving/displaying------------ its just a big-*** torpedo.
I'd also take a 1/2 hour to just randomly look at some of the Mids who have given their lives in service of the USA. Go here:
USNA_Virtual_Memorial_Hall pick year after 1890 (because there wasn't a Lucky Bag annual before 1894). If you pick war years, I guess some of the entries are more interesting. Whatever period year or name you pick, you will get their Lucky Bag description (how other Mids saw their classmate). You can read entries from friends/shipmates about their fallen comrade, along with citations, Obits, medals, Etc. I can't think of anything that brings home what the USNA is, Who the Mids are as a group, and what they collectively represent better than reading a few entries from
https://usnamemorialhall.org/index.php/USNA_Virtual_Memorial_Hall.
BTW: I think that the USNA is better in the morning than afternoon-----cooler/tighter/more about the business of the USNA and less about tour groups.