well, Its not enough to just solve for one color,
each edge piece has 2 stickers on it, each corner piece has 3 stickers on it,
you must satisfy all the stickers of a given piece of it
otherwise you arent really solving your first whole color.
to know which color goes where note the core color, white is always opposite of yellow, blue to green and red to orange, go on try and rotate the cube around, youll find this fact is constant.