Take the Bx7 bus from the #1 subway station at 231st St. The bus will run along Riverdale Ave., get off at 239th St. and walk west to your destination. From JFK take Airtrain from terminal to Jamaica Station, take the E subway to 42nd St. and transfer there to the uptown #1 subway to 231st St., then the Bx7 bus from there.
Take the Bx7 bus from the #1