Uhm, I highly recommend running WhatsCrap in the Work profile. Unlock it using Shelter.
Also, bad news maybe but that phone is insecure as fu*k. It didnt get updates forever and this means it will also not be private anymore if you get hacked.
LineageOS cant provide kernel updates or Firmware updates, thats simply how SOC devices work...
But good learning practice! Installing GrapheneOS is a breeze compared to LineageOS though hahahaa, I resized the partition of a Nokia phone once, to get a higher Android LineageOS in there.
It really is a shame how phones are made. Firmware has to be signed by the vendors, so you CAN'T upgrade it. I mean, if there was a big community they maybe could handle the Kernel maintenance, but not the Firmware.
I highly recommend you getting a Pixel 8 with GrapheneOS. It has very long lifetime, even though Google kinda sucks when it comes to hardware features. Their a models seem to have actively crippled Cameras (comparing a Pixel 6a to a 4a, it is worse! Not to speak of a Nokia 7plus which is years old).
But they are the only good one poorly, as they fully support running a Custom OS on it, including all hardware features. Samsung actively blocks custom OSses from accessing those.
When using Graphene, is the camera app as good as the default Pixel OS? I seem to recall running the old AOSP, you didn't get whatever secret sauce makes the Pixel phone's camera so good.
As far as I know it does not include Google's special sauce. You can install it back on in GrapheneOS but I believe that requires the Play Store. You also lose Android Auto in GrapheneOS
The GCam works without any sandboxed play service requirements. Note sandboxed Play Services. You can disable components, uninstall them again, give or restrict permissions, like normal Android apps.
On GrapheneOS you can also disable every App.
And Android Auto recently got support, fully sandboxed. But its crazy how much tracking that needs, I still have no idea what it is at all but it works.
I also tried Google Play Games, which is not available through their store, from Aurorastore, and with the sandboxed Play services it also works perfectly fine!
They literally preinstall the required libraries, although their camera is okay, you can install the "AI knows everything better than you" PixelCamera, you can install the LineageOS "Aperture" from the iodeOS repo, and you can install Opencamera.
I think LineageOSses Camera is better for photos as it has this "take an image from a video" thing so it works instantaneous. GrapheneOS camera may have better quality overall.