If you're not savvy at installing custom anything, and just want a setup that keeps the Android security model intact (unlike all of these LineageOS forks), check out GrapheneOS.org.
YES THEY WILL — I wouldn't even say it's "many" or "some", anymore.
"Most" is just insulting.
I'd evaluate what you're using, because it's likely to work just fine.
Can you expand on how LineageOS breaks the Android security model?
More details here: https://blogs.fsfe.org/larma/2016/microg-signature-spoofing-...
> I’d also like to point out a myths I heard regarding signature spoofing. Some people assume, that signature spoofing allows to break the Android signature security model and thus rogue applications can access private app storage. But in fact signature spoofing is only applied after installation if the permission was granted, it has no influence on the package manager security model.