Very nice little gadget, seems to be alike of the Raspberry Pi zero,
you could try install OK by following this guide: https://github.com/BitcoinFullnode/ROKOS-OK-Bitcoin-Fullnode/blob/master/tutorials/Update%20Cryptocurrencies%20Client-Nodes%20in%20ROKOS/How%20to%20Update%20my%20Cryptocurrency%20Client%20Node.md

We recommend gadgets and systems with at least 1GB, but yes BTC and OK run on Pi zero and 512mb devices as well,
so will be nice to test it with your new toy, we will start making more video tutorials, feel free to ask further doubts so
maybe we can cover them as well with video.