https://www.skillshare.com/classes/Exploring-gouache-Patterns-bonus-video-on-making-quick-repeat-patterns-and-mockups-on-procreate/1107508210
In this class, you will learn how to paint and explore patterns with gouache. Gouache is such a versatile medium in making illustrations and its also fun to create interesting patterns.  If you are beginner with gouache, you can still take this class as this class covers all the basics. although this class is for gouache, you can use poster/tempera or acrylics paints to take this class.