> No need for random forums. You should have been able to download an official LineageOS build from https://download.lineageos.org
But even if this worked (from what I have read, others had problems), there still would be nothing to make me trust "LineageOS", as I said in the reply to your sibling - there is no real name associated to the project, no GPG key embedded in the web of trust anywhere that I can find and not even on the download page are actually signed binaries I can verify myself to be trustworthy. Not even the Wikipedia page of the project lists a single individual involved!
No need for random forums. You should have been able to download an official LineageOS build from https://download.lineageos.org