>Since there is no moral code because God is dead, nothing matters, essentially.

I don't think Nietzsche believes that the absence of an divine and immutable moral law necessarily leads us to the nihilistic conclusion that "nothing matters". Rather, he argues that this void of meaning left in the wake of God's death leaves us with the freedom to construct our own moral laws and bring about a "revaluation of all values".

>He also doesn’t believe in free will and thinks the very idea of it is a stupidity.

Nietzsche's views on free will can easily be misconstrued depending on one's interpretation of what "free will" means. Specifically, Nietzsche attacks the egalitarian notion of free will with its doctrines of "equal rights for all" and universal compassion. Such ideas, according to Nietzsche, amount to the very antithesis of his own conception of free will, which affirms individual agency and self-determination. He terms this conception of free will the "will to power", associating it with values of vitality, passion and strength as opposed to the sense of passivity and restraint that is characteristic of egalitarian free will. The fundamental principle of egalitarianism, in Nietzsche's view, is the vengeance of the weak, who enviously seek to condemn and suppress the will of the strong and thus diminish them to their level of frailty. Having sated their lust for vengeance, they disguise their petty envy in the virtuous costume of "justice", and "freedom", all while bringing about the disease of mediocrity that plagues modern society. It is this notion of "free will" that Nietzsche despises and regards with contempt.