Unity Learn provides a variety of ways to learn about tutorials. Projects provides step-by-step tutorials on creating different games. There are tutorials on a variety of different topics, such as audio and navigation. There is also the official documentation and community.
These tutorials are less than ideal for beginners who don't have a programming background. Though Unity Learn does provide some coding tutorials, they tend to be faster paced than is comfortable for someone learning their first programming language.
The main draw back is that the first version of Hack & Slash is quite dated (uses Unity 3). However the author has started creating new tutorials with Unity5, including a new Hack & Slash series in the works.