Hi @JuanjoA
Thanks for your comment, it’s quite tricky to estimate when this book will be finished as it’s based on YouTube videos and those are still ongoing and I would assume they will be for a new few(3-4?) months so you can expect that this book will also be topped up for next 4-5 months.
I would say that you need some understanding of OTP and with this book, you can see how to apply your knowledge, so in the end, you have the first project behind your belt and should feel more comfortable that you can build some non-trivial apps.