It seems you already have awesome material, I also like to follow Kotlin Vocabulary from Android Developers Channel. You can always sign up for the Kotlin Weekly mailing list, follow Kotlin on twitter, they drop some useful tips from time to time and participate with the community joining Kotlin Slack
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It seems you already have awesome material, I also like to follow Kotlin Vocabulary from Android Developers Channel. You can always sign up for the Kotlin Weekly mailing list, follow Kotlin on twitter, they drop some useful tips from time to time and participate with the community joining Kotlin Slack