i learned frontflips first off of boulder type things into pow. i landed it first try, it was pretty easy, just tuck hard. backflips, find some sort of really lippy jump/rock type thing with a soft landing also. that will help you to initiate the flip, so just kinda look back and tuck the knees. i see you ski hood, so wait for a day with some soft snow to learn them. and then once you feel real comfortable flipping you can take them to the park.
have fun!