A juried craft show is difficult to get into. Thousands apply for the limited booths but only a few hundred are accepted in some of the larger and more popular ones. But, this doesn't mean that you shouldn't get disheartened. If you hone your crafts as often as you can, and have a firm belief in your skills, there is no doubt that you will eventually get yourself featured in a juried craft show. You never know, maybe you can even win the category you're in.
However, do not be adamant against joining non-juried shows til then. While they may not draw as much attention as juried shows, all you really need to join is a ready set of crafted pieces and time to call them up and have a booth reserved for you. That's it! You're all set for the fair.
But do remember that not all of the non-juried shows are worth going to. Do your research and find feedback regarding the event in the past few years. If you know a fellow craftsperson that says that it's a bad place to show off your stuff, look into it some more so that you are certain. You'd want to be careful, but you wouldn't want to pass up some good opportunities either.
One event that you should enter with great caution is the untried and craft shows that are only in their first year. In general, the event organizers are going to by tackling many issues for the first time, and they won't be able to deal with them as adequately as their more experienced counterparts. In a nutshell, you'll be their guinea pig if you go to these untested shows. I do not recommend it.
So there you go. Even if you have great belief in what you can do, it is always recommended to build a great portfolio first. Once you have an impressive collection of photographs and booth events and participation, then you can start playing with the big guns. So build up your portfolio starting now!