Sacrifices, Judaism, and more.

Hello Rabbi
I have questions that bother me:
1-What is the matter with the sacrifices? And what is the matter with the Temple? My moral instinct says that this cannot be a command of God, blessed be He, and that it is prescriptive. What is the Temple supposed to bring that we Jews so expect?
2-What is Judaism in your eyes? Who determines what authentic Judaism is and who has the right to interpret it? Nowadays, I mean.
3- What is our message to the entire world? God created the world! What is this supposed to tell me as a Jew? Is there a common plan here between us and the Gentiles? What is all this for? All the billions of people who exist? In addition, the whole issue of the 7 commandments of the sons of Noah sounds puzzling to me. After all, what? The person who lives in the Amazon needs to receive the 7 commandments of the sons of Noah in order to gain redemption (here, not in another world, which, as we know, is already redeemed in a higher world – unlike the Christian concept of Doug) and complete goodness, and that the channel for this is the Torah of Moses?! That’s not fair. What does God want from us! From him, the Gentile?