Well unless you become an active member of the community (like actually get involved in discussions and be respected), as Sengir pointed out, you can't really ask for help here. I'm not sure where else to ask, but perhaps if you searched for voluntary sprite/texture artists online (or if you're willing to pay, ones that want to be paid), you should hopefully find some. I'm not really good with this though so I can't suggest much else than Google.
As Sengir mentioned though, you shouldn't really worry about graphics until you've got the engine done.
As Sengir mentioned though, you shouldn't really worry about graphics until you've got the engine done.