Hi, Antonello! There are a lot of books sites and videos you can takes information about.
Try to practise as much as you can and one by one you'll get knowledge you are looking for. It`ll even best because you`ll take only necessary to you information.
At first stage try to make all work by "hand", when you'll have a lot of job just use programs like Lightroom (you can find free presets to it, by first time like on fixthephoto. com / free-lightroom-presets) or other, there are a lot free to use.
Studying, studying and studying....