How do you get from the “arguments for God” to the christian God specifically

Alright, let’s say I’ve conceded that maybe there is a “prime mover” or “necessary being”, something that explains why there’s anything rather than nothing and I’m not here to debate that part right now. But heres my question: how do you get from that metaphysical conceptto the very specific God of christianity? i just genuinely don’t see how the logic gets you all the way there, at best, they get you to a vague deist God