I started in an awesome CLF school last week and, it's my first ever brush with any martial arts. The only issue I've really come across so far is my balance. I consider myself rather athletic, but I have difficulty when changing stances quickly. If I slow down, with some focus, i can keep my balance but, If I try to switch quickly/fluidly I tend to stumble. This also happens when I'm doing certain kicks in rapid succession.

Any tips/tricks/drills aside from practice that you guys can recommend?

Thanks!