You could try to read a github project and look up syntax when you get stuck. But for languages, I just like to suck it up and go through the text version of the basic tutorial extremely fast. Or watch boiled down video tutorials at 2x. Take simple notes to remember syntax differences. It will be boring but over in 2 hours. That’s not much time.

Then you can find new interesting features that weren’t present or similar in languages you used before and take a bit more time to broaden your understanding why they were chosen, and how this creates new constraints, opportunities, or room for errors.

For platforms like node.js the architecture is highly variable and sometimes finding and walking through an example close to your eventual project will be most useful.

Cheers!