(they are super christian, to the point of refusing to let any of my siblings or me eat at all unless we pray)
So telling them flat out im an atheist would certainly pose as a problem. But, hipocrisy is getting irritating too.
If you attempt to convert me, i will pay you no mind.
is there a good way to do it that won't end in rage or argument. i get yelled at or punished for expressing not wanting to go to church as well so obviously there would be warfare (not literally)
Well, obviously you are a minor and live with your parents. So why not just play along until you move out or become an adult, whatever comes first? Trust me, what seems like a long time to you now will pass quickly.
Just be glad your parents are Christian and not muslim... in that case they would be obligated by religious laws to kill you if you left the religion (which does not always happen, luckily, but happens all too often).
And by the way, there are plenty of atheist Christians, so why don´t you consider accepting the positive contributions of Christianity without feeling the need to believe the religious nonsense? You are not alone there.