I just installed GrapheneOS on a Pixel 3 today[1], and it was easy enough that a non-techie could do it using the WebUSB-based installer: https://grapheneos.org/install/web
The only trick is that you have to make sure that your individual hardware is OEM-unlockable. The easiest way to do that is to buy a new device from the Google store; otherwise, you need to get the seller of a used device to check, or to just try your luck.
[1] The Pixel 3 will soon by end-of-support by Google, and then by GrapheneOS. But I had a Pixel 3, and I wanted to try GrapheneOS a while before I invested in a Pixel 4a or 5a for it. (So far, everything is solid, and I hope to stay with GrapheneOS until I can justify a Librem 5 or similar.)
Welcome to the GrapheneOS family. I highly think you should consider sticking with GOS, as the security model is much improved over devices such as the Librem 5.
Thanks. I like GrapheneOS, and I appreciate the software hardening. Though, for other reasons, I will like to someday move to something more like the Librem 5, when the timing is right.
The only trick is that you have to make sure that your individual hardware is OEM-unlockable. The easiest way to do that is to buy a new device from the Google store; otherwise, you need to get the seller of a used device to check, or to just try your luck.
[1] The Pixel 3 will soon by end-of-support by Google, and then by GrapheneOS. But I had a Pixel 3, and I wanted to try GrapheneOS a while before I invested in a Pixel 4a or 5a for it. (So far, everything is solid, and I hope to stay with GrapheneOS until I can justify a Librem 5 or similar.)