Novice question: Pinebook Pro does boot (does it?) but black screen

[Gert V.]

So today, finally after about a month my usb-to-emmc-adapter arrived. In the mean time I've been using the PBP on a regular basis with Armbian as the OS running from SD. Works really great for me, the occasional freeze hasn't been a big problem so far. With Armbian working like a charm I left Arch, booting from USB, for what it was, still curious though.
And now, with a new toy to play with, which OS can you recommend to flash on the emmc? I still regard myself as a novice in the world of linux and the PBP, so don't go all hardcore commandline on me, yet.