To get a specific result, you can try apps with more to offer, such as Tayasui Sketches for painting or Capto for working on images. Tux Paint for macOS comes as three disk image (. Well, good news is some enthusiastic developers took the matter into their own hands and essentially recreated a Paint app for Mac - Paintbrush.
The lightweight app is 4.45 MB in size and hardly uses any system resources. One of them is already installed on your Mac by default, only that its toolkit is hidden inside the app called Preview. But there are in fact more accessible alternatives that allow you to do better things and present much less of a learning curve at the same time. Pixelmator is an image editor for Mac OS X that allows you to create, edit, and enhance your images. At the same time, the app doesn't require you to go through lengthy workshops and spend hours in settings, which positively distinguishes it from other professional alternatives.