Actually, there's a lot of advantages to have a ntfs and linux on the same drive, but tbh, this is only good if you want to have windows AND linux on the same drive while linux is your main OS and your windows is a secondary one.
For installing windows? not really, get a windows iso, during the installation, you can choose the partition, just choose the ntfs one you did.
Now, because you are bringing this, let me tell you what i did because it;s FREAKING AWESOME!
I have a windows 10 taking 80 gb of my 250 gb ssd, the rest is my linux, What I did is through some very complicated stuff (there is a guide, i can tell you step by step what to do), i made a .vmdk file that is just a link to the ntfs partition that I plug into a virtual machine by virtualbox and I can actually boot windows inside mint
the very big advantages of being it physical is you can boot to it later AND it takes no more space than what you already allowed it to.
But for raw installing "just booting into it if needed", that;s very easy. If you are pissed off to restart to change os......well pm me about he vm, but it is long tbh.....