George,
Not from Baltimore but have visited on more than one occasion - three recommendations:

Go to Camden Yards and catch an Orioles game if they are in town. Great atmosphere;
If you like trains - Baltimore and Ohio Railroad Museum is unique place full of history;
Go to one of the many Crab places (ask the locals which one) and of course order the Chesapeake Bay crab (watch a youtube video on how to eat)

Baltimore Harbor Place I find less interesting, more touristy and hit and miss on cleanliness.

https://amiccis.com/

Guidotorpedo

I’ve only visited Baltimore, but LP Steamers was exceptional if you are interested in crab. It’s low key, away from tourist spots. My wife and I are big foodies and loved it, but locals may have other/better recommendations. We also toured the USS constellation in the harbor. I recall tight spaces/stairs, but if that’s not a concern we found that really cool also.

Baltimore like most cities you have to be careful driving / walking around at night. Stay in the Inner Harbor area as mentioned which Little Italy and Camden yards are basically a part of. If you’re up for driving a little south of Baltimore, Annapolis is a great visit for food, walking, shoping, and a night stay. Now if you’re up for a little further driving south/east of Baltimore say 1.5 hours and don’t mind spending a few more dollars, go across the Chesapeake Bay to St Michael’s, MD on the eastern shore of the Chesapeake Bay. Beautiful Eastern shore MD town with fantastic food, shops, walking, and places to stay. Any dish featuring Maryland blue crab and or Rockfish (striped bass) will be good and fresh this time of year in Annapolis or St Michael’s. Also chicken or steak dishes with a crab imperial or topping are always good….blue crab is in season. It’ll be hot and humid this time of year so be prepared for that.