New step yesterday, I’ve cleaned up a bit to make room and shrink the Windows partition.
Then I’ve created an EXT4 partition (with the MiniTool partition wizard) and installed Android X86 on it, made some configs and reinstalled all my apps.
No more USB stick to boot, hurray! For the moment everything seems working properly.

I’ve just testing with the live mode from an usb key plugged with an usb-c adapter.
Wifi ok
Bluetooth to headphones, ok
Touchscreen, ok
Rotation sensor detected, ok
Brightness control, ok
External usb keyboard, ok
Bluetooth keyboard, ok
HDMI external display, ok

Battery discharge seems a little bit heavy

It’s worth a try!