Whether using a mouse or illustrating on a tablet, Photoshop is a powerful design suite. The brush tool is one concept with a volume of knowledge behind it. You can build your own custom brushes from scratch or even illustrate brilliant designs using only the defaults.
It all depends on your skillset and how you work in Photoshop. If you want to learn more about the brush tool then you’ll certainly love this collection. Below you will find a series of articles and tutorials related to Photoshop, and more specifically the Photoshop brush tool. Read through a few of these articles and be sure to keep practicing your technique!