You still have to start believing, and that's voluntary
No, belief is not voluntary. You can certainly choose to act or pretend that you believe - but that's not the same thing.
For example, as stated above - you can't simply 'choose' to believe that spaghetti created the universe.
There are of course lots of things where we have little evidence about and so you may be in doubt - but even then one doesn't simply close one's eyes and point, saying:
"I choose to believe that, today!"
For example Ghosts. I suspect some people here believe in Ghosts and some don't. I don't. The reason I don't is because I am that sort of person, I mean I don't see any evidence for them and my life experiences, upbringing etc... makes me less inclined to be superstitious. Others are different.
Another example: I can't choose to believe in Christianity. I can however pretend I do and go to church. Especially if there is a beautiful Christian girl that I like there. Maybe my views will change. Maybe the Holy Spirit will descend on me and I will see the light. But I can't simply "Choose" to believe. The best I can do is make the environment and circumstances conducive to perhaps giving me the best opportunity to believe if my mind was ever able to do so.
But I can't just choose to believe something. Belief
itself is not voluntary.
It always puzzles me when people can't see that, because to me it's obvious.