Best Stack to learn right now

What’s the best stack to learn now? I’ve been using vanilla html, css, js to make simple sites and I haven’t even ventured into the backend yet. I am planning to expand my skills and I can’t decide which frameworks/technologies to study and use so I can make a list of what to study, and in what order. Any thoughts? Btw I’m still a newbie.

Here’s what’s on my mind right now:

-TypeScript -11ty -Scss -MongoDB -Python for backend (because I already know Python)