Continuing the discussion with @encantades from Howto troubleshoot issues with the easy-installer:
Just as you say, these are your install instructions https://doc.e.foundation/devices/starlte/install
And these your downloadable ROMs https://images.ecloud.global/dev/starlte/
I recommend my guide Know your hardware - Samsung
and either [HOWTO] install /e/ on a Samsung device from a GNU/Linux PC successfully
or [HOWTO] Install /e/ on a Samsung smartphone with Windows easily