Indeed, test the device first on Android. That way you would be sure that the bugs, if any, are coming from the port.

The last time I tried, I could flash SFOS directly from Android 10 install. This assuming that you also flash OEM AOSP9 too, as linked in README. However, I am not 100% sure it still works with the latest Android 10. I think Thaodan was reporting some issues with it. So, try to downgrade first.

Even if it doesn't work, you can still get back to fastboot mode and reflash device. Just stay calm, connect USB and if it is in reboot-after-reboot mode, hold VolUp while rebooting (or try to hit the correct moment).

Camera does suck, but the rest of the device is a joy to use. Hope is to get camera improved when AOSP10 base is supported.