Here comes the “if you are broke rebuttle…”
You can use hard lights from hardware stores then diffuse them. You can use amber gells to cut down light spill if you don’t have a large keyer. Outdoors works fantastic at a 45 degree angle to matte if you have no lights but use green for matching outdoors, because blue being keyed outdoors and indoors doesn’t match saturation to itself.
and…
Upload a TGA, TIFF or BMP at the highest quality to an upload site and post link. I’ll try keying it as a single image with Primatte Keyer. I have keyed worse for clients b4.