You can create your own brushes (or download brush sets, some are even for free). Working with layer sets makes organizing your art a lot easier when working with a lot of layers. It has a great amount of features, a lot of them customizable (like the tool bars, short keys, colors). If you only want Photoshop, it’s available for about $10/12 EUR per month (“Photography subscription”). If you need 3 or more programs, the full package is recommended. You can select single programs or get the whole program range (Creative Cloud). Advantages are that you pay a smaller amount per month/year, and always get the latest version. Meanwhile, there are only subscriptions available (no full versions). It’s a professional program with many options and features including an advanced layer system, processing effects, filters, adjustment layers, custom brushes, etc. The program I am doing most of my artwork, designs and image editing with (for over 15 years) is Adobe Photoshop. Free if you have a Photoshop subscription.monthly Adobe Photoshop subscription starts at $10 / 12 EUR.