The response you got above is the best advice. Get a second internal drive of any type and size, and install distros on that. You totally can partition your existing windows drive and install linux alongside it, but… you’ll probably screw something up along the way and bork your windows install. Use another drive and it’s much harder to do. If you want to be super safe, you can unplug your windows drive during installs and then it’s literally impossible to break your windows drive.
The other advantage is that nobody knows what distro will be right for you. That means you’ll want to distro hop - and that’s so much easier when you have another drive you can just format and start over with (and not worry about your boot loader).
To your follow up question, yes, linux can read and write to the contents of your windows drive. If you mount that drive, then you can do whatever you want to it, including deleting things that break your windows installation.