The first step, which is the most important step, is composing the concept and making the best sketch to start painting. The concept was about two creatures in love, and one gets annoyed by the other. (Fig.01) shows the sketch step, which I was satisfied with.
After the sketching was done, I started to compose a background using the brushes. In my opinion, brushes are a very important tool to use and you can make different kinds of brushes yourself. You can use different techniques to compose your own brushes, such as using a detail of a photo, which is the most common way to do so. Also working with some abstract or marked shapes could be a way too. By these techniques you could have a brush archive belonging to your needs, which would bring simplicity to your works. As seen in the images, you can make a brush from the 'Edit/Define Brush Preset' sections (Fig.02, 03 & 04).
The next step is choosing the brush and painting in the background. Be careful though, as using the brush in the same way and angle can cause the painting to become monotone (Fig.05).
After I get the enough saturation, I use some filters (Gaussian Blur) to achieve an out-of-focus blur, due to the distance (Fig.06).
For the characters and the other details, I started by filling the general lines and giving them dimensions. Due to the direction of light, the shadows are fixed. The light is from a cloudy daylight, so there wouldn't be clear shining light, but vivid colours (Fig.07 & 08).