My first time in 40k

This is my first time getting into the game and I've been looking at trying to set up a Dkok army. I have recently noticed a distinct lack of kits. It seems things have been discontinued? I've been told to start with a killteam box but from there I don't really know where to go. Any suggestions or help would be appreciated. Even if that's suggesting a different army to start with (as much as that hurts to hear)