crisco,
if you are in aa, it is my feeling that you have to get some good sober time under your belt before you start exploring the anons. but if you have that, then yes, it is a good supplement. a lot of folks do attend both.
they both are based on the 12 steps, and the focus is pretty much the same (working on oneself, working the steps), but in aa there is a room full of people that have been addicted to a chemical mood-alterer, whereas in al- or nar- anon, we have troubles with getting wrapped up in, or hooked, on other people. who most often are addicts.
please try not to be nervous about going to your first meeting. there are just other people who are also trying to understand, and dealing with much the same stuff that you are.