It's like drinking alcohol. Don't push it too hard or do something silly and you shouldn't get into trouble
On more meaningful note:
if you don't know what your doing, don't do it.
I applaud you for not being the fool who asks "I pushed my Vcore up and now my computer won't boot at all".
Read up on what other OC'ers do and understand the actions and effects around OC'ing. Good start though!