I have experience with HTML/CSS but Kotlin is better suited for my end game goals.

I’m unsure if this would be more appropriate in r/AndroidDev but as someone with little coding experience who wants to create a quality text based simulator mobile game between IOS/Android should I immediately stop trying to learn JS and focus entirely on Kotlin? What are the best guides or open source DIY projects for someone like me to truly understand what I’m doing? Thanks.