Adding new sunxi devices for OpenWrt is generally rather easy, as the SOCs tend to be well supported in mainline linux - so you can often get away by adding the DTS (often already available mainline) and adding rather generic image/ setup code, at worst adding some backports from newer kernels.
See previous sunxi device additions for inspiration.
Yeah, I have no clue how to do that
Total noob as stated
Using the dtb from another os for this device and the xunlong_orangepi-one-plus snapshot with some added packages I got it to boot but it soon slowed to a halt and I couldn't even use ssh
After days of trying to figure it out (even building from source) I've given up, If i can someone to help I'll continue but for now I'll just wait for someone else to try it.
I'll definitely switch over to openwrt once there's a build available or I get some supported hardware that can keep up with my networking