Well, I think you first have to look at what you're asking. Holistic nursing doesn't necessairly exclude Western medicine. Here's a link for the Holistic Nurses Association:http://www.ahna.org/AboutUs/WhatisHo...5/Default.aspx
I'd think you'd start there to see what the organization is all about..standards of practice, etc..see if that fits into what you're thinking. I'm wondering though, if based upon your statements you're really looking into alternative medicine. I'm not really sure what resources are available and more importantly what jobs may be available in that field. I'd definitely start with that organization and try to network from there.
I'd like to offer a word of caution: if you do decide to practice with alternative medicine, make sure you follow your state's board of nursing requirements for practice. I'm not sure about practice limitations in that field so I'd learn your practice act pretty thoroughly. And to maintain licensure, you're still going to have to meet continuing education requirements..if you look at CEU's and they happen to be for alternative medicine topics, please make sure they are recognized by your state board so you don't jeopardize your license renewal.
I have to say I'm puzzled by why you feel Western medicine isn't beneficial. I personally feel incoporating holistic ideals into western medicine is wonderful. Personally, I've come to realize the benefits of aromatherapy and have incorporated it into my personal life. And I do have friends who have signed on to the benefits of herbal medicines. But they use those in conjunction with Western treatments, an enhancement of sorts....to supplement areas western medicine might not be looking at. This isn't a criticism of your beliefs, just food for thought so to speak.
Having said all that, you could research what areas of alternative medicine you feel you'd like to explore then contact their professional organizations. For example, Aromatherapy is very big in England and I've gotten some great resources from organizations over there. Just try googling "Holistic Nursing" and you could even try "alternative medicine nursing". I got a lot of hits with the second one. Good luck to you.