There are already alot of react channels. The problem is, it's oversaturated and hard to get anywhere with. I haven't watched them because they are season 7, and I haven't gotten around to watching them yet. But if you truly like doing it, don't let this discourage you. You can always make ytps, assuming you have good programs to make them, and get a big channel to react to it. (React channels usually react to a another react video)
Also, what mic do you use?
I watched a bit of one, not bad as a voice actor, just needs a bit less of a push and more fit when there is punctuation. It sounded like a statement more than a question.