I you cared about peace your prayers would be that Russia end its invasion, not that we stop supporting the Ukrainians in defending themselves. As for how far we should go: give the Ukrainians the means they need to defeat the Russians. They have shown that they are more than willing to do the fighting. There is no need for US troops.
Your answer would lead to a Ukrainian surrender. But this would not be peace because the Russians would need to be brutal in enforcing their victory. Ukraine will no longer go peacefully under Russian rule. The only way for there to be real peace is for the Russians to go home and leave the Ukrainians in peace.
Ok, you won’t volunteer to kill Russians. What weapons and capabilities do you think we give the Ukrainians that will defeat the Russians?