I learned by reading through a book, then working through problems on https://4clojure.oxal.org/. If you've got JS experience it won't take too much effort to pick up. Don't get too carried away with forming the perfect tail recursive pure functional monad or whatever. Get into just doing what you're trying to do quickly, then after you're competent, read other people's code to correct your style.

I always go pragmatically, I don't focus too much on ultra complicated architectures, but more on get things done.

Clojure is great for writing backends. Checkout Ring and Compojure. Simple libraries for making an API :).

Will check those, thanks.

Jacek Schae's courses on reitit for the backend and reagent, reframe for the front end are very good

https://www.jacekschae.com/