Since Catalina randomly decided to destroy access to about 1/3rd of my software (I rely on old-school music plugins that won’t be updated) - I’m gonna link you here to the Mojave tool: http://dosdude1.com/mojave/
This is not my tool, it does require a Mac to use, in order to create the USB boot key you put in your PC.
I have successfully patched about a dozen ThinkPads and Dell computers with this.
Due to the ThinkPad’s popularity - support for virtually every unit that can support it hardware-wise exists. If you have any issues, there’s a great community around it, and personally, after patching, I don’t even worry about .x upgrades anymore and leave auto-update on - that’s how far it’s come.
I literally prefer the Lenovo to the Apple hardware.
And be prepared to swap your WiFi card, intel cards are unsupported, so are nvidia graphics.
Is there a workaround (replaceable card?), or does running Mac OS mean you can't use discrete graphics (which is a major degradation)?
https://github.com/mighildotcom/X230-Hackintosh is the guide i followed, it is very x230 specific, but should give you a good idea of the overall process.
Very occasionally I'll have a slight issue with resume from sleep, but otherwise pretty much everything just works. You will need to buy a new wifi card, and depending which you want to use may need to reflash a modified bios to get rid of the whitelist.