I found an injured pigeon
Late last night, I found an injured pigeon. It was bleeding from its chest/shoulder area (I'm not entirely sure about the exact location of the wound) and it can't fly. I searched online to see what to do. I put it in a dark, safe, and covered box so it wouldn't have any issues with other animals or anything else. This morning it is alert, standing up, no longer bleeding, and it has also pooped. I don't know exactly what to do now because the wildlife rescue centers are far from where I live and aren't answering, and I can't afford to take it to a vet. What can I do now? Can I give it food and water? How can I improve the situation?
UPDATE I shifted it into a slightly larger box, and I put some sunflower seeds and water, hoping that it eats and drinks. In moving it, I checked the wound to understand better what it was. Specifically, it has a wound on its ribs, under the wing. It had encrusted with the wing and the moment I moved it, it tried to fly but didn't leave, it is still there. If it doesn't eat what I put there, can I help it eat maybe by putting something near its beak?