Looking to start with kotlin

Hi. As the title says I’m looking to start with kotlin. I have one year of experience with nodejs, and I’m very familiar with oop, but the thing is, that I never touched java before, and I feel like I should know it. I’m saying it because when I’m trying to understand some code, the whole structure is really different from nodejs, for example a packet manager. I saw a lot of talks about kotlin and it seems like a really good language to know, and I really like the concepts. Has anyone was in the same place where I am, and now know kotlin well? Any tips and resources will be appreciated! Sorry for the long text 🙂