Nate Tolbert, Carson High’s first-year girls basketball coach, is facing a problem that at least two of the previous coaches have faced.Lack of size.Carson, which opens its season Tuesday at Reno, doesn’t have a player over 6 feet tall. It’s a problem that Todd Ackerman faced in his five-year stint as head coach. It made it hard to compete with teams like Bishop Manogue, Reed and Reno, who are the perennial Northern Nevada powerhouses.Because of that, Tolbert wants to play an up-tempo game which is natural when you lack height but have athletic, quick players.“We’d like to run more than …