Your pronouns are the ones you want to be referred to as, its that simple. So yeah, he/him if thats what you want people to use.
As for gender neutral pronouns, I just use them by default for everyone, especially on the internet when you have no idea who you are talking to as it is all anonymous (unless they have specified their pronouns in their bio/profile of course)
But overall you just get in the habit of using “they/them” unless explicitly you know their gender.
Once you get in the habit of it, it becomes more natural and you stop thinking about it.
Thats pretty much all there is to it, its quite simple and people who moan and complain about gender stuff are either:
Lazy, and dont want to put in the 1% of effort it requires to not be shitty
Really just bigoted but cant admit it out loud, so they complain about such things as a dog whistle to other bigots
Are extremely misinformed about what is expected of them. They seriously think the real world is out to get them, and that if they misgender someone they’ll get attacked for it (in reality maybe 1 person coughs uncomfortably and they get informed as an aside awkwardly). Non zero chance these folks also think vaccines cause autism and 5G causes cancer.