Hi @shaton welcome to the /e/ forum.
Quite a few questions there, much as I asked myself the first time I flashed a Samsung – I wrote this Know your hardware - Samsung.
Just to touch a couple of issues. The /e/ Recovery is made to be a replacement for TWRP, it has a smaller footprint, and you can be sure that the /e/ Recovery downloaded with your /e/ ROM will be the right one, no need to worry about TWRP versions. (Experts will say TWRP has useful features; others say that a more simple Recovery leaves less room for mistakes.)
In my article I mostly mention TWRP as that was what I used at the time.
Maybe one of the main issues you ran into was covered in the section
Your first boot into TWRP.
Please feel free to ask again where you need more information.