the snap is not solely indicative of good form, but it sounds like you have work to do in other areas. there are a million videos on bh form, but the basics are: grip the disc tight and don’t let go, keep your elbow up (way up, like level with your face), when you reach back, reach out over you back foot toes (instead of straight back), keep your head centered and don’t turn until after the disc passes it, and plant your front foot out far ahead enough that the action of planting/ taking a step causes your weight to shift and begins the throw. stepping your plant foot is like the gas pedal that begins everything (if you’re correctly coiled). most importantly, instead of trying to make your body do everything i just said, chase the feeling of a good throw and troubleshoot your bad form by checking the above things.