NTFS drives can be used by both Windows and Linux (you might need to install a driver for the latter but most user-friendly distros include them out of the box). So yes, if you have storage drives you'll still be able to access them from both sides.
There can be weird issues sometimes with this setup, usually as a result of Windows freaking out because Linux modified some file, but it's rarely anything severe. Personally I just flipped all my drives to Linux filesystems because they're nicer for several purposes and I am actively trying to avoid ever using Windows again at this point.
XFCE or LxQT > MATE in my opinion, but if I was trying to make a lean system I would just use a tiling wm, probably sway.