Lindsay Lohan is finally clicking off her community service hours in a desperate race to keep her ass out of jail — she reported for work in Brooklyn … and immediately reconnected with an old, young friend, a five-year-old she connected with on her docuseries. Our Lohan sources tell us Lindsay managed to sneak in a back entrance to the children’s daycare facility … dodging all the media gathered out front for her arrival. She showed up about 2 hours after she was expected — or roughly 90 minutes after most of the kids got there.