Although I haven't lived there in awhile, I can try: what is it that you want to know? Where to stay , where to party, what to see, where to buy RE?
For sight seeing, the museums, when they reopen are free! As are the tours of the capital--ask your representative for tickets. Climbing the stairs to the top of George Washington monument is a good workout. Kayaking the Potomac is nice, beware of the Great falls area though. (the sunken shipwrecks is an interesting nature experience, south of DC) Remember that DC area it was a yellow fever swamp though, classified as hazard, tropical duty by the British foreign office. So it is hotter and more humid than Queens.
As for partying, I'm afraid I'm out of date on that one, but the rectangle from say 22nd to the say 12th and L to U might be a good locus. I'm told that the Ethiopianl/Eritrean food is the best to be had outside of Adis Ababa, but last time I was there there were still no good renditions of fish oriented coastal cuisine.
There are a number of brew pubs, as one would imagine, but you have Yelp for that. There are also a huge number of Salvadoran places. I have not found great Haitian food, but there has to be some there. And of course there is West African food. I think there are 2 or 3 Michelin starred restaurants, if that is your thing. a local speciality is soft-shell crabs, which I adore. You can also do hard-shell crabs, much cheaper and do a bucket with fries and beer
The bus system is okay, but the Metro is great, much cleaner and quieter than NY but obviously 1/10 as extensive.
Good luck