I'm working up the courage ot install openwrt but if I go to my device's page(Cudy wr3000), it only shows that Luci is available on an upgrade.

Is there a guide for idiot's that can walk me through the installation process?

I could have sworn that a few years ago Luci was available on default on all new installs (when they merged the project with another router firmware, ddwrt I think it was called)