Wiped OS, ADB not working, verge of tears

I am new to this (clearly heh) and wanted to put CM12 on my OPO, as it just arrived today and CM11 is a bit dated.

So after 101 issues I got TWRP installed, great!

However I messed it up by wiping my OS off the phone, leaving me with just access to TWRP and nothing else.

I was reading about ADB, but I cannot get the ADB sideload to start on my phone (it just hangs...).

ADB also does not detect my phone when I do an ADB push.

Any help is appreciated :'(