Best way to learn JavaScript (JS) for ruby/rails dev

#discuss

Hi there, not a "real" developer, just hacking together (unsuccessful) projects often and automating my day-to-day.

I mostly use rails, ruby scripts on AWS lambda, and middleman for all my static sites.

The thing is, while I get CSS/SCSS (not good at it but mostly get it to do what I want), JavaScript is still a black box and it looks quite "unfriendly" to me tbh. So I basically google and copy and paste, but more often than not I just try to stay away.

I would still like to learn it for UI/UX and accessing APIs on static websites, plus maybe even small interactive web apps.

There are gazillions of resources out there, but does anyone know a specific one for ruby devs? The Michael Hartl railstutorial basically got me started in rails, has anyone checked out the LearnEnough?

Any recommendation would be helpful, doesn't need to be free.

Thanks in advance!