In my experience coaching both genders, my best advice is to be true to yourself, regardless of the gender you're coaching. Set clear, well-defined goals for performance in training and matches, and stick to them, fairly and firmly. Demonstrate that you care about them, and demonstrate through your own performance the kind of work ethic and commitment you expect from them.
What I've found is that the best girls' teams often play and interact in a stereotypically "male" way, while the best boys' teams often exhibit a "kinder, gentler" side with teammates. In other words, the stereotypes are often just that, and nothing more.
Regardless of sport/gender, 3 basic "John Wooden Rules" apply nicely.
1) Always be on time -- player AND coaches.
2) No profanity.
3) We don't criticize each other's performance in public, and seldom in private.
After that, all the gender differences have a funny way of working themselves out, with one modest proviso. When coaching girls, I always wanted at least one female assistant, more as a positive role model that as an inter-gender liaison.
Good luck, whichever path you choose.
