Your best bet for minyanim times: baltimorejewishlife.com… there is usually a minyan anytime you need one, so don’t worry about that…
For restaurants… pretty much all of them are under the Star-K Hashgacha, or Rabbi Weiss- both are very reliable (Fleishigs: David Chu’s, Umami, Accent’s, Kosher Bite, Dougie’s… milchigs: Tov Pizza, Caramel’s, Mama Leah’s Cococinno’s, Milk and Honey…)
Attractions: Depends what you’re looking for.. the Inner Harbor is a nice place for walking around.. Washington DS isnt far, and there is lots to do there…
Hatzlacha and enjoy!