How did you learn Xcode (SwiftUi & Swift 2.0). A beginner here and very interested on learning :)
Get prepared to invest a lot of time and effort here. It's worth doing it, but that's a lot of effort:
Once you have done, you could go for SwiftUI tutorial.
learning XCode
learning Swift
learning toolkits, as SwiftUI or UIKit
learning the API.
Once you have done, you could go for SwiftUI tutorial.