

I did just that with Windows 7 long past its support date. All my gaming was in Windows, all my work and everything else in Linux. You can do that in 10 too and in fact it will probably become easier for you after support ends, because there will be no new Windows Updates to trash your bootloader.
Edit: Don’t run programs from ntfs drives, icky stuff can happen. Just reinstall your games in Linux when you play them there. Gaming is also really good in Linux now, I’m primarily a gamer and do it all in Linux!
I play Starcraft 2 through Proton, it works pretty well. These days pretty much all distros are perfectly fine for gaming, maybe with the exception of Debian stable. If you’re new, I’d recommend staying away from Arch and derivatives like Manjaro. Also try to keep things simple for yourself and avoid flatpaks, snaps, and appimages.