Fuji Mommy - I can't comment on the single speed because I've never ridden one. But, regarding the mounting and dismounting, I recommend that you don't get too caught up on doing it "correctly" right from the beginning. If that part scares you, just do it how you're most comfortable doing it. I saw quite a few women doing cross their own way last year and it looked like so much fun that I'm trying it this year. I know that the technical stuff takes time and practice, but until then, I'm just going to try and have fun.

Good luck and keep us posted on how your first race goes!