The height of my deck is 17" from ground level. I want only one step off the deck. How do I build a one step stringer? Also, I want to use 2 2X6's for the actual step surface. As well the bottom of the face board is 10" off the ground. PLEASE HELP!!! P.S. This is my first time building a deck so please make it simple. If there is another way besides the step stringer I am open to ANY suggestions.