Yeah, the single microUSB port on the Cube is it’s biggest bottleneck. I can navigate CE on first boot with my TV’s remote that works via CEC. That ability is going to be TV & TV settings dependent.
I’m using a powered 4 port USB hub, connected to a micoUSB to USB-A adapter. It doesn’t need to be a powered hub, but I reasoned it would put less stress on the single port. BT LE doesn’t work in CE (Linux MT7668 driver deficiency), only BT BR/EDR (legacy BT). The Fire remote and the couple Android remotes I have are BT LE only, and won’t connect, so I bought a BT USB dongle. Mine uses a RTL8761B BT chip, cost $5 on Amazon, just plugged in and worked. Before you buy a dongle, check that CE supports the BT chip.
You can also use a USB mouse or keyboard for setup with a hub. And if you have a BT mouse or keyboard they are more likely to support BT BR/EDR and work with the Cube’s internal BT chip. My BT mouse worked when I tried it.
I’ve also considered getting a USB hub with included Ethernet (1Gbit). I’m keeping my eye out for a deal on a powered one with at least 4 ports.