Understanding the laws of the fundamentals of the Torah

Hello Rabbi, I would like to hear your opinion regarding two questions that have occurred to me regarding the laws of the Torah Foundations:
 
A. "[After all the 'formal' description of the definition of God and the obligation to 'know this'] – "And whoever thinks that there is another God besides Him transgresses without doing anything." (Foundations of the Torah 1:4)
Is it correct to say that the problem is only in recognizing another god? If a person believes that 'Baal' is God, but understands the concept in exactly the same way as in the previous laws, does changing the name make this an act of idolatry?
As I understand it, according to Maimonides, God is only a concept, and does not belong to 'describing' Him. In any case, idolatry is only a mistake in the concept (such as thinking that there are two). What do you think?
on. "[After describing the Merkava incident and the incident in Genesis] – And I say that it is not fitting to wander in the orchard except for those whose bellies are filled with bread and meat. And this bread and meat is for knowledge in explaining the forbidden and the permitted… And a small matter is the existence of Dabay and Raba, yet they deserve to be mentioned first because they are the first to be considered by man. Moreover, they are the great good that the Blessed One, blessed be He, has bestowed upon the settlement of this world in order to inherit the life of the world to come. And it is possible for everyone to know, small and great, man and woman, with a broad heart and with a narrow heart."
We are accustomed to understanding "the things of David and Rabbah" as Talmudic-Halachic scholarship. However, the end of Maimonides' words implies that these are things that are accessible to everyone.
Therefore, I said in a possible way, which means knowing how to fulfill the commandments, that is, a Mishnah Torah (according to Maimonides, his book is sufficient to answer any halakhic question). And the phrase "settling the mind of a person" perhaps means settling the mind in the sense of being free from distractions, because an ideal halakhic person acts according to the halakhic law in a "rational" manner (i.e. without emotional biases). What do you think?