Requesting help installing c++ language support with intellisense for Oni [Help Wanted]

I'm having difficulty setting this up. I couldn't find instructions. It's over my head, to be honest.

I read that I should install clangd, which then lead me to install LLVM. Another vague instruction was what to put in Oni config file. I am not familiar with Oni config files.

I'm not even sure what I'm doing. I could be trying to do something that is not what I want.

The only IDE I've used was Visual Studio. It works with c++ out of the box and shows me everything I need to know about my code. And it runs my code and tells me if there are problems.

So what is the language support for Oni for? And how do I enable it?

Thank you for your time. The project looks promising.