I had a Win10 and a second partition with a few backups.  That partition
was the "Active" partition according to diskmgmt.msc, which I assume
means it had my bootloader.  I went ahead and moved my backups from that
partition to my Win10 before I installed SL, not considering the
consequences of the location of my bootloader.  I could totally use the
Win10 recovery disc to reinstall the MS bootloader and then reinstall SL
since I just installed it anyway, but I'd rather try and set up GRUB
myself, for the experience.  That said, I have no idea how to start.  I
installed the yum package, but what now?  Can anyone link me to an
article or something to read that will give me an idea of how to begin?

-Aint