Our local group doesn't seem the smartest. Therefore, I think it may take a little work for you to get into fighting with them. Not to mention, of course, the minimum age being eighteen. I don't think our group has any lower-level accommodations. So you'd still have to wait a year.
That being said, if you like the middle ages for any reason other than fighting, the SCA is generally a great idea, if you don't mind hanging out with people twice or thrice your age (in our group at least).