Ok
[email protected] . I did what you said. I sideloaded it twice. It looked like it worked. It asked me about the signature failing, if that was ok....etc. Like in Lineageos. BUT....in the logs...it says couldn't mount 0/emulated or system. And in TWRP...it won't let me mount the first 4 options....system,vendor, product, or ODM.
I worked a little more and found it has the following missing folders.....
/odm
/product
/vendor
/system_root
I don't even understand this stuff a lot to be honest. I'm going to try to read more...
I will say this though...I can get into my external sd card (via USB adapter) in TWRP. But that isn't working either.