This wasn't clear to me so I'll explain further, Above the timeline you'll find the vertex, edge and face selection modes, to the right of this you have two options that you skip, then you get to snapping options, in order to be able to snap to surface you have to select Face as the type of element to snap to, and then the option should appear as a ball with a dotted square on the right, then go to forward ortho and press G and left click and it will instantly have snapped into the correct position.
