From reading this book you’d have a very good grasp of the underlying theory, much more than many ML engineers. But you’d be missing out on the practical lessons, all the little tips and intuitions you need to be able to get systems working in practice. I think this just takes time and it’s as much an art as it is a science.
The only guide post to use in this world of ever increasing information to learn is to ask yourself "do i find learning this stuff enjoyable?", questions like "can i become an expert" are vague and not good guideposts.