How to Give Away Too Much for Free

I find it's almost impossible to give away too much for free. The right amount of information at the right time is like a dosage of prescription medication more isn't necessarily better. I'm going to do shamanic work so it's a little bit different I do sound healing ceremonies and so I did one webinar where I was able to, well I'm doing full moon ceremonies where I'm doing more of like an activation and seeing mantras etc. And then inviting them for a connection call afterwards. What would you suggest to create that sense of urgency and impact because it worked I got one person and I sold for the first time so it's good but how can I bring how can I