Currently, Android is the largest mobile platform. So it would make sense that developers want to start by creating Android apps and games, rather than going to iOS. Although the reason for developers choosing iOS first is due to the number of devices available. With iOS there aren't as many devices as there are with Android, making it easy to make one app and have it work on every screen. However this new Android Design course available on the Android Headlines store should help make that easier.
This course will teach you everything you need to know for developing for Android. With this course, you'll be diving into the fundamentals of user experience (UX) design, and you'll also be mastering the principles of Material Design. You'll be able to utilize UI patterns from Material Design, and use Photoshop to craft wireframe and page designs. The course also teaches you how to install and use Android Studio IDE to help develop your app. It's a really great course that's available, and it's currently just $18. Typically this course would cost you $40, so if you're interested in picking it up, you'd better hurry as it'll only be at this price for a few more days.