My advice to new kicad users is just to watch someone on YouTube go through a familiar project and see how their flow is, then try to create your own project from design to implementation. Next, check out the kicad library guidelines to see what it takes to create a library part so you can get everything right. Lastly, open up the shortcuts screen so you can see what key does what, you’ll get the most common ones quickly and the others you can see when you are going through menus.