I think for noobs it will be better they buy the Chinese phone such as Huawei that does not certified by Google and emulated it with gbox for GMS support. Then they still they got their favourite apps going even banking apps as well. https://storage.googleapis.com/play_public/supported_devices.html
Yeah before I use Ubuntu. my first exposure on Linux is Linux Mint and it seems Linux Mint support secure boot atm. if this gets worst. I will go back to linux Mint again