One way to finish more paintings quickly is to consider minimalism. The Japanese have elevated this in their culture in many areas. The silent, contemplative pause is present in many of their art forms. One style to investigate is called Semi-e. It is done with ink like watercolor, but I mimic the look with acrylics here
If you would like to add a few simple contemplative artworks to your collection you can include "minimalism" or "Semi-e" to your prompts and see what it comes up with.