Walk in and ask. Seriously. This may be a bit "Mama-ish" for you, but the world is yours for the taking...those that inquire, get. If it's something you are interesting in, find out what you need to know. I may sound overbearing...I just had a similar conversation with my God Daughter who just graduated from High School so it's still fresh on my mind. Put yourself out there. Ask questions. Do NOT be afraid to be everything you can be. :-) The worst thing anyone can say to you is no. Then make your plan to make that "no" a "yes"!
That said, I took my first Wilton class with a girl who worked there, (16) and a mom with her daughter (10). As long as you can get yourself to the class and produce the products you need...if I remember right a few cookies, some cupcakes and a cake, you're in. You will have to buy the kit.