I didn't so I haven't but, I am planning this for a long time but I just can't execute it.
What's stopping you?
But I keep wondering: what does it take to turn all that into something real? Like, how do you go from idea to book without totally losing steam halfway through?
I think that I've seen some guidelines from udemy or such websites on how to publish one. .
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I'm glad you mentioned it, I'd forgotten about it before.
You can also simply search for help on YouTube. There is really good help there for all kinds of areas.
You'll also find a few blogs that can help you.
Podcasts have also become increasingly popular recently. You could also find help there. Although the focus here is certainly on book reviews. But you will also be able to find discussions about literature.