Hi Sam,
It is best to get used to either the overlap or the interlock grip. The reason for using either one of these grips is so that the hands work together as one, rather than against each other.
The most widely used grip onthe Tours is the Overlap 'Vardon' grip. Although more recently the interlock grip has gained new popularity as it is that used by Tiger Woods and of course was used by the Great Jack Nicklaus.
I have put together a grip lesson
here that explains how to grip the golf club with either of these two grips.
Enjoy.