Iskren has written up a lot of good guides on how to customise a AOSP ROM, use it to extract firmware blobs, and ultimately mainline the device to get it to run

Iskren has written up a lot of good guides on how to customise a AOSP ROM, use it to extract firmware blobs, and ultimately mainline the device to get it to run modern Linux OS's like PostmarketOS. Its a really comprehensive hand-holding guide, written in a very engaging way: https://mainlining.dev/ https://mainlining.dev/ There is also the mainlining guides at postmarketOS wiki, though these are harder to understand in my opinion: https://wiki.postmarketos.org/wiki/Mainlining_Guide https://wiki.postmarketos.org/wiki/Mainlining_Guide