There are paperweights that cost less.
if you want a decent linux support I don't recommend buying.
Wait until support is present and all code are public.
only in this way you can change something.
Boards:
orangepi plus, olinuxino A20, cubieboard A10, mele A2000 .....
Not only the GPU but also the VPU.
The only thing that makes this SoC (H3) interesting is H265 decoding in hardware and support for 4K for the rest the A20 works far better.
Xunlong is the only one that makes dev board with this SoC all others are OTT Boxes.
Boards:
orangepi plus, olinuxino A20, cubieboard A10, mele A2000 .....