The philosopher in Khozari

In the SD
Hello Rabbi. I have a few questions please about the philosopher in Kuzari.
1. What does he mean by saying that God is not connected to the world, eternal? Does he believe in some spiritual being, only that he is disconnected from the world? What does he mean by saying a. "And God never created man, because the world is eternal"? b. "And everything is from the first cause, but not from an intention that belongs to it, but through the path of ordination. From the first cause, the second cause was ordination, and from that, the third and fourth causes were ordination"? What is the logical logic in these 2 arguments? I simply do not understand the logic in saying that everything is ordination from this supreme God, who is disconnected from reality, and that he did not create man, but man was simply created? And what is the logic in saying that the world is eternal? At some point, it had to have a beginning, right?
2. If I understand correctly, the philosopher's serious problem is the will of God. If we say that He wanted to create the world, then He is lacking and in any case He is not God? (If I am wrong about this, I would be happy to explain) And if we say that He is connected to the world, why should He bother with small things, and with our wills, etc.. After all, He is so great and we are so small.. My question is why it is impossible to say that precisely because He is so great and infinite, He is also able to will small things, and He also cares about us, etc.. After all, He is omnipotent, so He can also will and it would not be a paradox.
3. How can we even talk about it in terms of wanting or not wanting… To us it seems like a desire and in any case a disadvantage. Maybe it's not like that for him?
4. Why does the philosopher remain in the position (at least initially) of a philosophical God? What prevents him from saying that God is indeed involved in reality?
5. Is it correct to say that there is no significant difference between such a philosophical God and the absence of God?
Thank you very much!