If I don't know Java(and don't care to learn to learn it), and I want to learn Kotlin and know its best practices, what are some good resources? I don't necessarily want to do Android either. I actually want to do more server side stuff.

Imo you really need to learn Java first.

and play with try.kotlin.org

Thanks! I guess the manual is often good enough what do you mean by Javascript? Is it for the transpiling?

What Javascript?