Why do we refer to God through “he”?

So for clarification Iam quite secular and I plan to study the Torah one day, and I apologise if I rather should have said Hashem instead of God in the title. But could someone religious explain to me why religious Jews will call Hashem by “him”, when not having a male human form like in Christianity. This may sound like a very foolish question, but I would love it if someone could explain.