Help needed..... installing OPEN-WRT in Western DIgital ROuter mynet n750....

Hello guys,
I got WD mynet n750 Dual band Router ...
But i got stuck while installing Open WRT to it...( It doesn't support DD-wrt but it does support open wrt)

Sorry Im "Technically" illiterate ....

so I really need to know the process step by step and like a child .....

I followd the exact procedure from here
Western Digital My Net N750 - OpenWrt Wiki

but it seems that something is going real odd..here...
i am not getting webUI as i used to get at factory firmware and also now i cud not go back to old firmware....
and what the hell is this Luci??? telnet??/etc.... (Told you im illiterate...)


pls pls help me....asap....