I have created several XCODE projects that showcase my skills. I am sharing a few simple projects that you can try out to get a feel for using XCODE. I would recommend beginning with an idea for an app. Next , check on the app store to make sure it hasn’t already been created (if you have an APPLE DEV license and plan to distribute.) Then start with a design. I would create the views first. Next connect any inputs, outputs, transitions, and buttons, ect. Add additional code to create the functional app. Try the application on several virtual devices. Make sure you flip the device as a real user world to assure you have a responsive design. Always start small and iterate. There are some really good YouTube Video Tutorials that can get you started.