Good luck with that. I managed to get Kubuntu, Mint and Tuxedo running on the same drive as Win10 following this guide, but Cachy didn’t want to play along. Also, one fine morning Windows decided that the boot media is missing and died. Like completely. Tuxedo still boots fine but Windows complains about “Missing boot device” or something. So from my personal experience, I would totally advise against a dual-boot system on the same drive. Better get a second drive and install Cachy on that.
Just my 2 cents.
Edit: hello and welcome to the forum 