https://www.domestika.org/en/courses/636-introduction-to-procreate

Throughout the history of digital illustration there have been a succession of leading programs, from FreeHand to Adobe Illustrator, through CorelDRAW and many more. Today, Procreate has taken their place as the top illustration app for iPad. In this seven-course Domestika Basics, master Procreate from scratch with Román García, illustrator and biologist who has collaborated with renowned magazines such as National Geographic and the Real Jardín Botánico of Madrid.  The first course is all about laying the groundwork, analyzing the synergy between Procreate, the iPad Pro, and the Apple Pencil, and why this is the perfect combination for tackling illustration projects. Start by installing the application and beginning to explore its interface.  In the second course, draw your first lines in Procreate before taking a tour of the program's different brushes and basic drawing tools for creating your own digital sketches.