KitKat Rom for a newbie topic

Ive got an LG Gpad 8.3 V500 , to date ive not done anything with it. I posted last night about scrolling in landscape that it was lagging on one side.
I was advised to use a custom Rom

Ive never done this , can anyone suggest instructions ( in laymens terms ) on how to do this and also the most stable KitKat rom to use as i like the Nexus devices.

Thanks