Best OpenWrt Router for a non-tech savvy person?

I have very little knowledge about networking. I want a router that is secure and private out the box. (will probably harden it by following some random guides on the internet)

The recommendation list on the official OpenWRT website is pretty useless.

My main concern is that the hardware is proprietary.
1. Can they still have some hidden backdoor even flashing OpenWrt to the router? (maybe a persistent system?) For example, if I flash OpenWRT to a HUAWEI router, can …

non openwrt privacy router tech