What i need ? for custom rom (noob proof) topic

Hi I am little bit confused about how to install custom rom on this phone, because i find some tutorial and post for noobs but I still don't understand what exactly I need to do for install some ROM.
I will want install some ROM without Sense UI like this but I am not sure what is S-OFF/ON and if i need it for that. Which recovery, kernel etc ...

I have HTC Sensation XE (Z715e) hboot: 1.29; SW: 3.33.401.153.

So if you can please help me and recommend me please some links.