@Shane Blackburn Udacity's Kotlin Bootcamp for Developers and Coursera's Kotlin for Java Developers(prepared by JetBrains) are courses targeting people who already know java. Mostly, people learn first java and then kotlin. I don't know if there are kotlin courses targeting complete beginners to programming. 🤔
In fact I believe it is possible to learn Kotlin without prior java knowledge. But since Kotlin is new and java is still dominant in the literature.. I think it still makes sense to learn some java first. (Not necessarily master it)