Replying to Newbie backflips

I started trying to ski park last year, my jump game has always been weaksauce and my best trick is a 360 with the occasional 540. One thing is that for some reason, outside of the snow, I have always been able to front flip but never backflip. There used to be a mental block in my head, even in the pool I couldn't do the motion of a backflip for the longest time. Somebody told me something about backflips (which I don't remember) and some how the next time I tried doing the motion I was able to do it. I've always wanted to do front flips on snow, but I know that backflips are a lot easier. How can I go about bringing backflips to the snow? I haven't even tried it on the trampoline, because I'm scared after a bad experience about a year ago when I landed on my head and gave myself a crazy ass nosebleed.