Start of Round 1... START FAST AND HIT HIM FIRST preferably with a stinging low-kick.
That should give you a psychological edge. If your first shot is hard with lots of agression your opponent will know you mean serious business - and might even throw him off to some extent.
If its his first fight then there's a good chance it will rattle him since he hasnt got the experience and his still full of 'first fight jitters'. So... get the psychological advantage - that will give you confidence - and that confidence will open up the way to a win.
Good luck.
