If its your first time, let the guy your sparring dictate the power in the punches. Just try to stay calm and relax. Its sounds easy, but that's where most newbies falter. Other than that, work your jab, don't forget defense, and keep that chin tucked. R
stay calm.. dont go nuts when you get hit... breathe right.. keep your chin in.. bite the mouth piece.. guard up.. just learn as much as you can.. hopefully your in with someone experienced.. let us know how it goes.. welcome to the ring bro.