You gotta be nice sounding and chill.
On my commentary channel I got 800 subs. But I had to stop but I'm about to start it up again.
My recommendation for every commentary channel is stick to a certain thing and keep going with it until you drive your fan base up enough to play what ever you want. Always be positive, rage but be funny about it. Have a good intro. (Not like a graphic intro) like an opening like kinda catchphrase. Ex- PewDiePie. I'm pretty sure we all know that one. My most watched video was when I censored myself because I cussed wayyyyyy to much and censors make everything funny

. (But editing censors in are annoying). Also try to come out with content daily. Unfortunately for my upload speed is AWFUL so I upload right before I go to bed.
I hope I helped
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