Saved over the previous version of an InDesign file on my pc

This is why I always work in a Onedrive or Dropbox folder. They both keep versions and you can restore with one click.

@leo.r  Windows has a built-in recovery called 'Previous Versions'

If you have Previous Version working you can go back and recover old files by date

https://pureinfotech.com/enable-previous-versions-recover-files-windows-10/

https://support.microsoft.com/en-us/windows/recover-lost-or-deleted-files-7bf065bf-f1ea-0a78-c1cf-7dcf51cc8bfc#:~:text=Previous%20versions%20are%20copies%20of,referred%20to%20as%20shadow%20copies.

In addition to James' suggestions:

Make sure to run incremental backup at all times (that is the type of backup where you can retrieve the version of your files from days or months earlier - depending on your backup drive capacity). On the Mac it's done by built-in Time Machine; on Windows, as far as I understand, you'll need to obtain a 3rd-party solution.

Also, other users suggested to work off Dropbox or OneDrive which, if I understood correctly, will also keep previous versions of your files. 

Not really. In the olden days, tools like Norton could explore the FAT and find the content, sometimes even completely restore a file. (Systems rarely write over the same sectors, so the old data is there, just no longer 'indexed.')

But in these days of terabyte drives and all kinds of indirect file access and automatic disk defragmenting and cleanup... I'd say no. Sorry. It happens.

Learn good backup practices, such as doing a Save-As under an iterative name every day, or more often if you're doing a lot of work. You can always delete the oldest files from time to time, but you can never get back one you didn't save...