That's also roughly what I see on Windows for my Electron app [0]. 0% idle CPU and about 200MB of RAM. That's large but acceptable compared with other non-Electron apps running, like Sublime Text (170MB) or Thunderbird (320 MB).
You have some choice native apps - Sublime is Python, which is rather horrible with memory usage and Thunderbird essentially embeds a browser just like Electron apps.
Compare VSCode or Atom with Emacs or Gvim for something more native.
In my list of applications that are always active, Firefox and ConEmu are also over 500MB too. The exception is Total Commander (amazingly, still compatible with Windows 3.1), which is only 20MB but it's more the exception than the rule.
[0] https://imgur.com/tMhEwtp.png