Help raising wild duckling?!?!?!?

HI, i found a little baby duck on the side of the road today and im gonna keep it. so my habitat for it right now is a little hamster shelter igloo thing. theres a dog dish for it to swim in. its in a big container. the bedding is hay and grass and im feeding it bits of tortilla or soggy chex cereal. its also inside where its pretty warm but im not sure if it should have like a heating lamp or something. i think its attracted to heat because it always likes to be on my hand. thanks!