D. Yellow cross

Your goal now is to complete the yellow cross. Note that there are only 2 algorithms to remember here and not 3 as it might seems. As you might noticed, the "Dot" and "L shape" are sharing the same moves.

Also, the orientation of the cube does not matter. Only the orientation of the top layer.

Just hold the cube as shown and follow the recipes once or twice.

If two first layers are solved and your top yellow layer does not match any of these cases, you're probably got lucky and can skip to next level.

Almost forgot - unlike the white cross, don't worry about matching edges or corners; you'll do them later.