It will teach you just everything you need to learn about how to make your own films.
But a guide to filmmaking might also be not enough. You might also not be able to create your own films only with help of the guide. Maybe you need to enroll yourself in a film making class to learn directly from those who really have the knowledge on how to create own films.
You can go over the Internet for some film making classes. Maybe you can try to just enroll yourself in one of the film making classes available. Maybe it will be better for you to learn directly from those who really know how to make own films.
But you might spend much with a film making class. With a guide to filmmaking, you will most likely not spend a lot. But then of course, if you only have the money then why deprive yourself of the chance to be a maker of films. If you can