The Soundview Ferry is just a 5 minute walk and it is a great way to get to Manhattan. It cost $2.75 each way and you get great views on the ride. It is clean, modern and has a concession stand on board. There are also a couple of bus stops at the end of the block (3 min walk).
Yoselyn's place has everything you need and worked out well as a home base for our adventures in the Bronx, Manhattan and Queens during our stay. It was great to come home and relax with a movie or TV show. The Shoprite Grocery Store on White Plains is about a $5-$7 Uber Pool ride and has a good selection of fresh produce, meats, cheeses and other things you might need.