[matlo]

Second this. I have the same router and it's extremely easy to setup, and it supports Wireguard out of the box, which I love for its simplicity. It has a simple interface on top of openWRT, for non-experts like me. Support is a bit crap as it's all in Chinese but it works like a charm.

[pueblito]

I have to chime in with a third; I have been very happy with my AR300M from the same supplier for the last CPI years and I am planning on a new one from them soon.