What are the best resources to start my Kotlin journey? Thanks!

I would say use Youtube. That’s what I used. Though I learned Java then Kotlin.

This one is really good https://kt.academy/ But nothing taught me better than trying to make Android Apps.

IMHO, Kotlin in Action is a really good way to familiriaze yourself with Kotlin despite the fact that it describes Kotlin around version 1.0-1.1 and there are a bunch of featuers that appeared in later versions. After it reading Kotlin docs and learning missed topics is really enjoyable.

I really like the Kotlin Koans: https://kotlinlang.org/docs/koans.html I prefer the IntelliJ version to the online version since you get immediate warnings if you make syntax mistakes. Also notice that the Koans are part of a whole section on Learning Materials 😉 I leaned Kotlin by doing the Kotlin Koans and by reading Kotlin in Action and I loved both. There's a second edition of Kotlin in Action on the horizon, but I'll probably take another year to come out. But if you preorder it now, you'll get the first edition as an ebook: https://www.manning.com/books/kotlin-in-action-second-edition