There’s lots of good advice here!
Don’t learn C/C++/Rust. They’re great languages but you’ll get stuck learning things most experienced programmers don’t understand and you’ll get discouraged.
Python/C# are both great options!
If you want to do mobile development, you might try Kotlin (for Android) or Swift (for iOS).
The trick is just to learn one language, to learn general programming concepts, then learning another in the future will be a lot easier.
You can learn a lot from following online tutorials, YouTube, etc., and you can find communities for each language too.
Also you don’t need to learn to program, there’s a lot of other good skills you could learn. (I keep trying to learn to draw or 3d model, and I just can’t do it lol).
Maybe, hopefully not, but even if it is: with WebAssembly, you’ll be able to (you already can actually but it’s not very widely used) compile and run many languages in the browser, other than JavaScript.
I wouldn’t really recommend learning JavaScript as your first language, it’s pretty weird. Unless you really want to learn web development, then go for it! maybe check out TypeScript though - there’s a lot of learning material for both online.