For me, not needing another app and the fact that is easily selfhosted is great. For Obsidian you have to pay for their sync solution and I remember the logseq app was cumbersome and the web client wasn't so good, but that's my opinion.

I've been using silverbullet for a while. Selfhosted, saves everything on simple markdown files and easy to customize with plugins and space scripts.

I use QuickWeather and use the Open-Meteo integration. You can even selfhost it for better privacy probably.

Gold cube? You mean the CHEESE?

If you want to continue in the same function you'll need to use async/await. In your case:

async function yourFunctionName(){
    // previous logic
    const myVar = await fetch("myFile.json")
        .then(res => res.json());
    console.log(myVar);
    //rest of code executes...
}

Realize that you have to add async to your function and await to your fetch call. Also take into account that if your function returns anything, it'll now return a Promise instead.