can one register there and learn benefits

Yes, sir. They have personnel on the first floor when you walk in, who will answer questions. Just head to the help desk, and they will send you to the correct person. Semper Fidelis.

Can you make clinical appointments on Saturday's

I agree with Jared!They are extremely helpful in the first floor

Yes they will assist you. FYI there is a VA in BK, Qns, Bx, NY, and NJ in EO, and Lyons.