MacBook Pro Dying After High Sierra Release

I have a mid 2012 13” MacBook Pro and I downloaded High Sierra 13.10.2 yesterday and basically it looks like the OS update was too much for my machine. In disk utility the Mac HD shows 99.09 gb of 489.9 full but the Apple HDD partition shows 499.55 of 500.11 used 😡

I don’t have a lot of files on the machine; I am not a gamer. The machine was working fine before I downloaded any of the High Sierra versions (which now I wish I never did).

HELP! I am stuck. I have a Mac I can’t use and I’m pretty frustrated. I went with MacBook because I didn’t want to deal with Windows issues any longer. I don’t know enough to *do* anything with the machine other than probably make the problem worse (I was considering erasing the partition but then when I reinstall the OS I’m still stuck with High Sierra so I don’t gain anything by doing this).

Sorry to be verbose but I am looking at a proverbial brick wall here. Thanks for any tips you can provide.