Looks like I may have finally figured it out, should I leave this post for a reference on how an idiot like me troubleshot?
I installed Edge Mint 20.3, so far so good. I was scared to reboot, the initial reboot after install, but it booted up. There was a dark blue page, said Perform MOK management at the top, in the middle was a box with four options: Continue boot, enroll MOK, enroll key from the disk, enroll has from the disk. I hit 'continue boot, is this correct? yes it booted, but if I hit a different selection will I avoid this screen at reboot?
* I hit the LM logo on the bottom left, and or hover over the icons on the bottom and it's all symbols. My friend said it's a corrupt download, reinstall, so I did, the symbols went away, but now my software manager won't work.."E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem..."E:_cache>open() failed, please report", turns out I couldn't get the update manager to cooperate, so I restarted, oops, there were updates going on, and this the reason for the error.
So I installed Edge 20.2, but ran the update manager immediately and let it finish, so far everything is going good. Said there's the 20.3 update...I'm scared to do it, lol.
Anywho, this seems to be just a noob trying to figure it out, but thanks to this forum I was able to figure it out...so far.