What kind of dropoff is to the right?
Deck looks smaller then 12x12. haha. I'm building a 10x12, swear its larger.
Did you say where you live? not sure if you need to dig sonotube footings. that low, probably not, but still might if you get frostheaves.
I would go off to the right towards the garage. Given its so low already, I would seriously just consider no deck, and all patio. 12" deck as stated, silly to me.
Build a deck around an pool if that is a possibility some day.
Other needed info. Where does the sun cross over? Like, my sample WIP deck. Sunrise is off the E corner of my house to the right you can see, sunset other side of of the house. House faces NW. That deck will get full morning sun, full Noon sun, and shade in the afternoon. during winter, sun is lower. And will get a bit more shade at all hours, due to tall Southern Pine trees.
My FRONT porch has a roof. gets late afternoon Summer sun, but shaded most other times.
so, make note of sun, and consider if you want a pergola, screen, canopy, etc as well. Full on sunroom, or 3 season room? possibly a deck for now, that will be later upgraded into a sunroom.
yeah, siding/roofing bowing is clearly just .jpg compression.