Now that you have solved your first layer...you are ready to solve the second layer.

2 of the fundamental cases:-

2 basic algorithms you need to complete the second layer

2nd layer algorithms

Situation

Algorithm

R U R U R U' R' U' R'

R' U' R' U' R' U R U R

Now we proceed to the troublesome cases:-

Troublesome 2nd layer cases

Situation

Algorithm

Use either 1 of the 2 basic algorithms presented above to displace the edge of of its slot, and then reapply the basic algorithms to insert it correctly in.

Insert any top layer edge to displace the edge you want out onto the top layer, and then apply the basic algorithms to insert it into the corresponding slot.

If you have performed the stuff correctly you should get the following: